Hmmmmm.....think I'll vote for keeping the 8oz tank up front, as there really is no reason to add 4 more ounces. Trainers aren't normally flown at full throttle throughout the flight, which allows you to fly 10-15 min. Slow fly-by's, shooting touch & go's, hammerheads, etc'' is what's fun with trainers. Play with the left stick (both up & down and side to side), and you'll find you can really have a good time in the 10-15 minutes your flying.

Gary