Like alot of guys I purchased a NeuCastle 1518 1800kv motor when they were on sale, and it arrived today; here it is compared to the Gmaxx's existing MedusaResearch 36-80-2000kv motor:
Just got to trim the wires down and solder on some 5.5mm bullets, then figure out my gearing- gonna gear up to compensate for the slightly lower kv rating & to make use of all that tasty power on tap; nearly dwarfs the Medusa..