No one seems to have noticed that in the original post this person clearly stated they weren't going to be doing aerobatics. I have flown an 8.5 pound plane on a TT .46 and it flew exactly as intended. Slow, gentle, and on the wing. I set this plane up this way intentionally. I was having problems with doing things I wasn't really ready for with my better powered planes and they were getting wrecked alot. This gave me a plane that I wasn't likely to crash as I knew it wasn't capable of much more than just flying around. With that Stick, you won't be able to loop, roll or do anything else without a lot of altitude. If you fly it as stated in your original post you should have no problems.

My Top Flite Cessna 182 is all scaled out and weighs in at a tad over 14 pounds with a Magnum 91 four stroke and a 14X6 Master airscrew K series. It needs full throttle to get off the ground, but once airborned, I normally put around at 1/3 -1/2 throttle. Any faster, it wouldn't look scale.

You will be fine, it will fly it, but not the way a stick is meant to be flown. Maybe prop that engine for thrust, like a 15X4 or something. My 2 cents.

anyone have any experiance with a Super Tiger G3000 on a Giant Big Stick?

The .90 is very light, but that means nothing, you will have to load up with lead to get the CG where it belongs.

Get any small 26 sized gas powerplant. Cheap to fuel and maintain. They can he had for far less than a Zenoah! I have a Z26 and a Brilelli 26, love both. The Brilelli is very, very light. You can get a chinese one for around $200...

Gerry