i have 2 Ice's, and have been right on the verge of pulling the trigger and building my own m1 packs to charge on them. problem is, the cost of the lipodapter and if you want to do it right, a balancer on top of that.
a guy i work with is going the m1 route and just bought the
cellpro 4s 4 amp charger/balancer. it'll fully charge m1 cells. you sure can't beat the price at $75. could be worth checking out.