I've got a few boats that are powered with .12's because the IMPBA has recently upped the "A" class limit to .129 so I thought that I'd see how fast I could make them. you have to find the right motor to power it because some don't have the right timing numbers that we need.
I think that DirtDummy will agree with me, twins aren't for the inexperienced or those of us like me that are easily frustrated and impatient.