I have a H9 Pulse XT 60 with an OS .61 FX in it and it flies great. It is a fun combination. I also have two GP Cherokees, one with an OS .46 AX and one with an OS .55 AX. They both fly great but the OS .55 AX does over power it. I perfer the one with the .46 as that is more than enough power. It is fun plane to do landings with flaps. I also have the GP Escapade with a Magnum .46 XLS in it. It is my current favorite plane and I have been flying it for 1.5 years.

Bruce