Hi everyone!

I have just finished the giant scale zero from world models. It's a very nice flying and looking aircraft, powered with os 160 FX.
My only concern for the time being is the mechanical retracts provided in the kit. Not only it is not looking very nice it is also working very badly and needs constant tuning. I am considering replacing it with pneumatics.
Is anyone having the same problems, and any idea what retracts could easily fit in this plane?
Badly need a little help.[&:]
Thank's.