I've never owned an L motor but if it's been pushing an e-savage around it should'nt have any issues with an LSP. Most guys run XL's or equivalent but I've read about several truggy's that run well on L's or 1512's. On the voltage cutoff, imo, 3.0 volts per cell would be best. You can actually go as low as 2.7 but that leaves no room at all for slightly out of balance cells; @ least 12 volts for safety's sake.