If you have your mind made up on a Dazzler (I had one and didn't like it) it takes a lot of mixing to get even a mediocre knife edge. They are fun to fly but crappy covering and the fuse is weak at the LE of the wing. I hated the permanent attached wing. I later got a Twist and it's 10 times a better plane all the way around. The Twist needs mixing to get a decent knife edge. The TT .42 is probably enough power..I ran an OS .46 AX with 12.25x3.75 APC prop.