I have just done a DM-1 conversion and what I am finding is you need to pick the motor kv and voltage very carfully if you intend to run the 2 speed tranny. 2 speed really limits your gearing options. I have only been able to find pinions/spurs that allow a 2 tooth range on the gearing. Thats not much to work with when dialing it in. So pay close attention to the rpm you are looking to achieve with the motor, you dont have the option of "gearing up" to get the speed if you want more, and you also dont have the option of dropping the gearing if you missed and are too tall and getting hot.
That is the limitation I ran into without alot of 2 speed pinion options.
Mike has released a 2 speed pinion adapet for a 5mm shaft and it is pretty sweet. However as of now it only supports the stock Losi SLT pinion gears, and there really arent many options for gears available on that. He did say that he will be working on a rnage of gears for it in the future, but I dont think that it is really high on his priority list right now, so when that will happen is not really clear.
After all that... Are you planning to run the 2 speed or convert to a single speed. I am really liking the way my DM-1 drives with the 2 speed.
I can't decide if its more fun
to make it...
or break it...