VJ, Eddie here in OKC, OK. I have the same Hanger 9 J-3 Cub. I run the DLE 20 in mine. It has plenty of power and using a Zoar 16/8 prop. I know some of us are using a 17/6 Zoar also. Mine balances latteraly pretty well also.
I fly mine about 1/2 throttle most of the time unless for a loop or etc. Mine weighs about 16 1/2 #'s without fuel.
I wish you the best and get on here with us and visit. It is soothing.

Thanks,
Eddie