The 1.5d should be a great motor for the LST2. I'm considering that one for my LST too. Generally, lower kv motor's and higher pinion tooth counts lead to happier, cooler running components. The problem on the LST is that you have to be maxed out on your gearing options(FOC w/swap mod, 59t TiNi spur and 25t pinion) to achieve race pace capability(not quite 37m.p.h.). I haven't looked at the 1.5d on Brian's Speed Calculator yet but it should should enable you to either run without the swap mod, keep the 63t stock spur, or run a smaller pinion and still maintain an adequate pace to be competitive at the track. I'm gonna start with the 2200 because I'm not financially able to fork out for the motor yet and it will be less expensive to get the combo once they are available as well as I'll need another V2 MMM anyway.