Leel,
The DP manual even suggests 100 oz. min on the ailerons. I think those big ailerons need more than 70 oz. Mine sure did! I had 8231s on at 77 oz and stock hardware when it went in on a windy day after turning into the wind. Good luck with this. It would be much cheaper to replace the aileron servos now while you can.
Sincerely,
Bob