I have a problem I'm trying to resolve. I currently have a 60 UCD with a 91fx. I'm deciding to also buy a 46 UCD. I originally planned to put a saito .72 in it I have laying around collecting dust. The saito .72 has only 10~13 tanks through it. After reading some of the posts concerning the UCD, I'm worried if the saito .72 isn't going to be enough power for this plane. Should I 1. take the 91 FX out of the 60 UCD and put it in the 46 UCD. 2. Just put the saito .72 in it and go with what I have, or 3. Buy a saito 91 or 100 and put it in the 46 UCD. I myself like to overpower my planes slightly. I'm just not sure if the saito .72 will satisfy my desires in this plane. I wish I could fly this plane with all three engines to make a more accurate decision on what I prefer. I personally wanted to have a primary plane with a four stroke in it. Most of my planes have two strokes in them, although I do have a couple four strokes which I do not fly too often. If I need to buy another engine, I understand but I definitely want to have enough power with this plane where I can confidently get myself out of trouble.