What's this KOR place you are talking about, I might try it out. I do still need a proper tutorial on how to remove the piston.
http://kenoconnorracing.com/
engine disassembly
http://www.blasterforum.com/threads/blaster-engine-disassembly-vid.42997/
engine assembly
http://www.blasterforum.com/threads/kor-engine-assembly-vids-no-crank-puller-needed.51169/