This is the 2nd tail heavy plane after follwing the user manual. Have a Tiger 2 low wing by Goldberg. It comes with trike gear where the two main wheels are mounted directly at the CG on the wing and a nose wheel. I'm using a OS .46 AX engine that is mounted beyond the 4 1/8 inches as suggested by the manual. Matter of fact, the engine is mounted as far forward as you can get on the mount. You have a roughly 1 inch CG range. After I get all the stuff in there including a 4.8 volt 1600 nimh rx pack up against the fuel tank, the plane balances in the suggested range. However,
the plane will not sit even. When you put it on the ground, it falls toward the tail thus the front wheel isn't contacting the ground. If I put in 5 and a half ounces of weight under the engine, the front wheel will touch. I'm wonderin if the designer and testers were drinkin Ripple when they were testing!!!! [:@] What I have for weight is a metal plate and a big washer.
I'm thinkin of just epoxing the damn things to the wood protrusion that is attached to the firewall and juts out. Of course, they will vibrate loose, hit the prop, break prop while I'm on final approach and that will be the 3rd crash in the cornfield.
My Hangar 9 Twist was the same way. Had to add 6 ounces to it before it would balance right.

Dave...