After a scoreless first half, Llanidloes got the game's first score in the first minute of the second half and they kept a firm strangehold on the students for the remainder of the half, scoring another try mid way through the half to make it 10-0.
With the last move of the game the home side capped a fine second half performance to score their third try, converted to give a final score of 17-0.
Llanidloes will play either Newtown or Aberystwyth 2nds in the Final.
To view a photo album from this game, please click here
In the Mid Wales Shield, Welshpool booked their place in the final on Friday night with a hard-fought 18-10 victory over Trefyclawdd. They will play the winners of COBRA 2nds v Llandrindod in the final.