Maesteg clinched promotion to Division One with a 39-23 victory over Loughor at Llynfi Road. The Division Two West leaders now have their eyes on clinching the title in the final weeks of the season.
Ryan Turner, Ross Powell, Kevin Ellis, Chris Owen and Chris Jones all crossed as the home side romped to a bonus point.
BP Llandarcy and Kidwelly are battling it out for the second promotion spot, with just one point separating them after the weekend's results. Llandarcy won 21-14 against Ammanford but their lead was halved after Maesteg romped to a 39-23 win against Loughor, Andrew Francis and Luke Marshall crossing twice.
Newcastle Emlyn are just a point away from sealing the Division Three West championship after a narrow win over strugglers Cardigan.
Emyr Jones, Carwyn Thomas, Iestyn Crompton and Alex Williams all crossed for the victors as they crept to a 23-21 bonus-point win.
Crymych kept up the pressure on second-placed Llandeilo with a 35-25 win at Haverfordwest. Tries by Gut Griffiths, Kenneth James, Rhodri Davies and a double by Gareth Davies means Crymych can still clinch promotion if Llandeilo slip up.
They did no such thing on Saturday as they met Penclawdd, thumping their hosts 51-22, scoring eight tries in the process.
Lampeter Town boosted their survival hopes with a fine 36-24 win at home to Morriston. Gary Davies, Dewi Williams, Tim Evans and Cerwin Gregson sealed the bonus point for Lampeter, who jump above Cardigan into 10th place.
In Division Three South West, Skewen still have their noses in front after a routine 34-5 triumph at home to Seven Sisters. Fly-half Richard Davies crossed twice, while there were also scores for wing Simon Jeremy, number 8 Edward Price and prop Rhys Jenkins as they took the bonus point.
Tondu are still in with a shout, as they lie two points behind after drubbing Brynamman. Doubles for wing Craig Fox and flanker Andrew Evans helped them to a seven-try, 45-10 win.
At the other end, Maesteg Quins may have already accepted their fate, but still managed a spirited win on their trip to Briton Ferry. Owen Richards, Geraint Evans and Tom Petty scored the tries as they won through, 27-18.
Nearly 40 players were involved in the first Wales Under 18 training session of the season. WRU National Performance Manager Gethin Watts is excited at the potential shown by the group and expects the Regional Under 18 Championship to hone their skills even further.