musltang
I recently purchased an SK 90 from
http://www.kangkeusa.com/
I was pointed in this direction because i wanted more than the os 70 I had in my funtan x50 (about same weight as UCD, 6 pounds), and at a moderate price. I have not tested it yet but i have heard it is ported for lower rpms, thus being able to swing larger props, perfect for 3d. I think it likes to be proped under 10,000 on te ground wich means 15-16 inch props are in operating range. Plus, you can't beat that price.