there's a big diferance to yanking on the elevator at a take off speed barely above stall and yanking back when your well above fling speed.

i fly off grass as well (when were not in a 7 year drought) and when i first started i had a tendancy to pull on the elevator ASAP to get it in the air, this often ended in the plane sort of mushing it's way skyward with my instructor yelling "less elevator" in my ear. Now i have better ground handeling skills i love leaving it on the ground untill i get up a heap of speed (well fast for a 40FP) then yank back and go straight up, it makes the balsa a guys squirm when they think of the damage they would do if the engine cut out, with my SPAD DPS i'm not so worried