RE: I blew an engine
Sorry, XJet, I wasn't really talking about your comments in particular. I have no idea what your shopping circumstances must be like in New Zealand. You're a Thunder Tiger engine owner, and not one of the folks who critisizes them out-of-hand without ever having owned one.
Thunder Tiger engines get bashed here in the states by folks for hard-to-find parts when it simply isn't the case here.
Hopefully you will track down your crank case quickly enough if you don't replace the whole engine outright.