I'm certain that most anyone reading this thread has seen my other posts regarding the 25-12, but if perchance someone missed it I will simply say that I ran the 25-12 on a 20.5x14 RASA and was "Wowed". This is "THE" combination for this plane and makes the intermediate level machine an absolute MONSTER! The RASA prop rocks and the 25-12 handles it with no problem. Having flown a Berryl and an Integral I can say without hesitation that the E-Motion is simply better. Easier to roll, slows down more, sturdier gear, and simpler to make weight. The only consideration I would offer (and I believe UAL767 may elaborate) is that the battery tray may be to short for optimal CG. Most of us prefer a more aft CG which gives a lighter touch when inverted, but the tray as it is setup in combination with the most often used power setups leads to a forward CG so adding an extension to the battery tray which enables moving your batteries aft by 1 inch or so is not a bad idea

JP