I just bought a previously flown Sig Kadet Mk II from my instructor and am installing the engine, radio, etc. I have a couple of questions.

1) Can anyone tell me where the CG should be on this plane?

2) I purchased a Hayes tank to replace the ancient tank that came with the plane. I've always (in my very limited experience) used Sullivan or Du-Bro tanks with the three hole stopper and brass tubes. The design of the Hayes with two of the three holes molded into the tank seems a lot simpler (no tubing to bend). Are there any problems or drawbacks to this design?

-Scott