Just my opin but your way over powering this with a 30cc engine. My PT-17 weighs 15 lbs and flies very scale on a DLE-20. No problem with the fire wall coming loose yet and if you mount the batteries out front with the engine it balances just fine. There is not enough meat in the wings for robart hinges so I use nylon hinges with a removable pin although the CA ones work fine. I mounted a better tail wheel by drilling 3/8" holes in the tail block and then gluing in dowal pieces and then drilling for #4 screws.Ground handling is better if you don't jam on the throttle and instead power up slowly like the real thing. A couple of pics of my pt -17 and my buddies super.