i have had 3 motors on mine:

satio 180 20 oz tank
rcs 1.4 gas 12 3/4 lbs 1100 nicad 600 nicad 10 oz tank
os-160 12 7/8 lbs 2700 NMHi battery 20 oz tank

rudder 8411
elevator jr 8101
jr 537 ailerons

i think i always get the heavy kits he he if i use glue