HI
I have a aerostar 40 that i flew 2 times 10 years ago. it has been in storage,now I have decided to learn to fly.
I bought this plain already built new at a hobby shop so I have no instructions.
Two questions
(1) I replaced the fuel tank ,the old tank was just placed in the nose with rubber sheet wraped around it. should i block it in with balsa or....?
(2)When i check the balance how do i know were it should be, do i check with a full tank ?

Thank You
By the way i love this site.