RE: Center of Gravity
tele,
Is 28% the recommended c.g. position? If so, you should definitely add ballast in the nose to get the c.g. right, especially if you are a beginner. Do this no matter how much lead it takes! The last thing you want as a beginner is a tail heavy aircraft.
Putting the stabilizer on the level marks should be fine.
If your aircraft is glow powered, I would reccomend balancing it with an empty tank.
Tip: If you need lead, go down to the local garage and purchase a strip of self adhesive lead weights used for balancing car tires, inexpensive and very handy.
/Red B.