Hi, Advent:

I think the GWS Formosa-II will fits your need.
I upgrade my GWS Formosa-II to Himax 3516 outer runner brushless, APC 11x8 @ 8600rpm, total weight is 34 Oz. Poly-Quest 3S1P 2100mAh/20C Li-Po. With careful throttle management, it is able to finish one Master sequence plus two passes before run out battery. More detail can be found in NSRCA K-Factor March issue, my article "GWS Formosa-II for pattern", or my post in this forum.
Hope this helps.

Luke