RE: CG Tiger 60 fuel tank
I had the Tiger 60 about one year ago, and I beleave it had a 12oz tank in it.
I had a OS61 FX on mine and did not have a problem with runs being too short. I bought the plane second hand and never had the tank out of it. The plane met its end at the hand of a flying buddy.
Good luck with your Tiger and don't walk away if you decide to let some one else give it a try!