Sorry I missed this thread, there wasn't much activity here during my build...

I've been flying mine with the YS .63 and love it! I'm using a 13x6 prop with 30% nitro - yields about 11k RPM. It's a great setup and offers plenty of power while keeping it light for 3D. I'm running a 12 oz tank which gives me about a 15 minute flight time. I could have gotten away with a 10oz tank but I didn't want to empty the tank during a low hover or somthing like that. With the battery pack located behind the rudder servo everything balanced perfectly (using a single elevator servo). A friend at the field was flying his electric version and thought my glow setup had more power; his trottle response time is quicker though. The electric to glow conversion required some work to get things totally fuel proof, but it ended up working out fine. I'm using the Hyde soft mount to keep vibrations down since it is such a light and rigid airframe. The only mods I made were replacing the tailwheel assy, using an Al spinner, painting the cockpit floor black, and using vinyl graphics to jazz it up a bit. I was able to route the muffler inside the cowl by using a stock OS header pipe made for a 70 surpass.

Here's a quick flight report: flat spins and tumbles are great; I get a little wing rock during elevators and harriers so I'm going to try a spoileron mix; stall turns are easy and tight; it weathervanes more than expected but this may be because it is a 3D setup (not very nose heavy); it knife edges without any roll or pitch coupling; the ailerons are so sensitive that I keep turning the rates down; slow flight is excellent and it does not want to snap out; it flies pattern type maneuvers well but the huge control surfaces make it a bit touchy. Overall - it flies great, is tons of fun to fly, and is beautiful.

Here are some pictures of my setup.

Steve