Local guy here runs the K10 in his MBX6T, and it goes very, very well.. His pal is always buying the really expensive stuff - Toro Nero, Capricorn whatever, and the K10 just keeps going whereas his buddy's expensive stuff causes lots of problems. Not newbs.
Also, if the K10 is really identical to the Go GX-5R as I have heard, then it's plenty grunty for truggy... The Go's are underrated, just because they're from Taiwan.