Beddau are the new leaders of One East after they turned in a sparkling second-half performance to beat Llanharan at the Dairy Field, inspired by the brilliant Rhys Trulove.
Llanharan scrum-half Chris Williams landed two first-half penalties to give his side a 6-0 lead at the break, and they no doubt scented an upset.
But fly-half Trulove turned on the style, continuing his magnificent start to the season by scoring 17 points, including a try, to help his side fight back.
Robert Downes, Dan Palk and Chris Roberts also crossed for Beddau, as they stormed to a 32-16 triumph and a three-point lead at the top of the table.
Blackwood suffered their first setback, losing 20-17 at Ebbw Vale. Wes Cunliffe and Gary Wilkes scored the tries for the hosts, while Sam Mill added 10 points with the boot.
Bedlinog put their stuttering start to the season behind them as they beat Bargoed the Recreation Ground.
Ben Grzesica's good form continued with an 18-point haul, while Marcus Klyne, Huw Waythe and Huw Jones all crashed over in a comprehensive 33-24 victory.
Ystrad Rhondda's dismal form continued as they were edged out by Merthyr. Wings Phil Coccoran and Matthew Trowbridge, prop James Howe and skipper Gareth Williams scored the Merthyr tries as they ground out a 29-20 win.
Newbridge and Gilfach Goch looked in decent form as they beat Rumney and Treorchy respectively.
There was late drama in One West where Narberth kept up their 100% record with a nervy victory at Corus.
Narberth had led 20-7 at half-time, thanks to tries by Nick Jones, Lee Glanville and Wayne Williams. But a Robbie Morgan double and one by Richard Thomas brought the scores level at 20-20 with two minutes to go.
Narberth's Aled Davies then slotted over a penalty before Corus replacement fly-half Cody Rees missed a last minute effort to hand the visitors the win.
Bridgend's bid for a return to Premiership rugby still looks in good shape after a fourth straight win, this time at Whitland.
Adam Hillier-Rees, Kyle Maiden and John Leyshon scored the tries for the visitors as they eased home, 29-19.
UWIC suffered their first defeat since moving west, going down 20-18 against Llangennech, Waunarlwydd edged a thriller at Maesteg and Bridgend Athletic drew 31-31 against Carmarthen Athletic.
West round up
The Ammanford wings produced the spark for the leaders of Two West as they continued their superb start to the season with a tense victory over Aberavon Quins.
Mike Evans and his partner on the opposite wing Gary Stevens scored a double apiece for the hosts, while Steffan Jones also crossed, to seal a 36-27 victory and consolidate Ammanford's lead at the top.
Second-placed Tondu missed the bonus point in their 21-16 win at Builth Wells, while Skewen are third after a James Ball double saw them to a 41-21 triumph against Newcastle Emlyn.
The performance of the day went to Aberystwyth, who beat previously-unbeaten Cymllynfell 45-25.
Barry Thomas, Llywarch ap Myrddin, Jason Rees, Paul Stubbs and Carwyn Thomas scored the hosts five tries as they sealed a bonus point.
Kenfig Hill opened up a five-point lead at the top of Three South West with a 28-11 win at Ystalyfera.
Steve Gillard, Tom Briggs and Nicky Morgan went over for the visitors, who missed a bonus point for the first time this season.
Ryan Thomas was the hero for Nantyffyllon as they edged a 64-point thriller with Bryncoch.
Wing Thomas scored a brace as his side scraped past strugglers Bryncoch - still without a win - 33-31.
Scrum-half Tim Pike scored a fine hat-trick for second-placed Glynneath, who beat Cwmavon 32-3, while Aberavon Green Stars lost for the first time this season, going down 26-18 at home to Brynamman.
The top two met in Three West, and it was Crymych who came out on top against Mumbles, thanks to a special performance by Rhodri Davies.
The scrum-half scored a brilliant hat-trick to help his side to a 36-23 win, and to the top of the league.
Dunvant opened their account for the season in emphatic style with a demolition of Laugharne.
Sam Crawley's hat-trick set them on their way to a 52-7, 8-try victory.
Amman United are top of Four West after a 25-20 win at Trimsaran, while a Rich Hills hat-trick sent Vardre top of Four South West after their 43-24 triumph at Pyle.
East round up
Brynmawr couldn't muster even a bonus point from their opening three games in Two East, but they opened their account in emphatic style with a 44-23 demolition of Ynysybwl.
No8 Gareth Morris was the star for the hosts, bagging a brace, while there were also scores by Greg Napp, Michael White and Jared Seale as Brynmawr climbed off the bottom of the table.
At the other end, Tredegar sealed a bonus-point win for the fourth weekend in a row with a comfortable win at Penarth.
Centre Tom McPhearson scored twice and Aaron Quick and Ron Kynes also crossed, as the leaders continued their fine start, winning 28-12.
Mountain Ash and Llantrisant are also unbeaten after bonus-point away wins at Tylorstown and Llantwit Fardre respectively.
Rumney produced a superb second-half performance to beat Croesyceiliog and preserve their 100% start in Three East.
Josh Perry was the key man for the victors, scoring twice and landing three conversions as his side edged out a battling Croesy, 26-16.
Blaina scored a first win of the term with a 22-18 win over Abergavenny. Scott Horner, Fiepo Nobatano and Tom Bowd grabbed the tries.
Pontypool are also still unbeaten after a four-try win at Risca, while Abertillery BG scored their first points of the season with a 29-15 win at home to Tredegar Ironsides.
Senghenydd are four-from-four in Four East after they put five tries past Oakdale. Centre Ryan Nichols scored a double and Kieron Hughes, Alun Ford and Lee Keenor also touched down to see the leaders to a 39-17 triumph.
Chepstow are also still unbeaten but were made to work hard for victory by Nantyglo. Tries by fly-half Ashley Young and centre Jonathan Thomas saw them to a narrow 17-13 win.
Gareth Peebles scored a brace for Abercarn in their 30-23 win at Talywain, while Nelson heaped more misery on Machen with Ryan Jones, Chris Pitt and Iestyn Herun tries condemning the visitors to a 19-15 defeat.
Flanker Matty Dix, returning from two years out after reconstructive surgery on an injured shoulder, was among the try scorers for Blackwood Stars as they beat RTB Ebbw Vale 27-12 in Five East.
And there was a stunning display by Monmouth centre Dewi Lane as he scored five tries to help his side dish out a 72-0 mauling to Usk.