I have built three of these and worn them out. The .52 is heavier and can overpower this plane if you are looking for that. The .46XLS with a tower muffler and 12X4 apc prop will hover it at about 3/4 throttle and give unlimited vertical. I was getting over 13,800 rpm's on the .46 with Byron's 15% nitro fuel and the tower pipe. The stock muffler was only giving me about 12,600 rpm's. I used std 3004 servos on a 6VDC battery and had no control issues. This plane is a real confidence builder once you get it trimmed properly. Does well at fun flies, most 3D, and excels on low rates on pattern practice.

It's a little fragile on the landing gear area, may need to beef that up a little, but so are most of the other 3D planes of this size.

Watch out for the fuel tank, all of my OEM tanks split and had to replaced with a dubro or sullivan. I hear they may have solved that problem, just check the seem carefully and don't over tighten the tank seal assy.

Hope you enjoy yours as much as we have ours.