I have a mlst2, running this motor
http://www.hobbycity.com/hobbycity/s...idProduct=4202
on a old mamba 25, 3s, and It has done fine for probably 10 packs or so, but I am not really a hardcore basher. Needs a center spool or something, pretty much just blows the front tires off. I havn't had any other problems though.