I would highly recommend scrapping the L2M2 -- I had one as well (well, an L2Happ, which isn't much different), and the design is highly flawed (this according to the creator). I had a n issue with overheating where I actually had the annodized coating burned off a heatsink because of a buildup caused by improper circuit design.
I'd highly recommend going with a PWM2M2 from Aganyte over at the gamoover.net forums, which is the newer version of that board. It's a much more stable implementation and it works really well.