My recollection is that the TT46 is an ABC engine (or is it just the TT46Pro?). In any case, there is a somewhat different break-in procedure for ABC engines (having a tapered cylinder bore) -- short, hot break-in periods, rather than slow, rich break-in. Check this thread:
http://www.rcuniverse.com/showthread...eak+in+AND+ABC
pjj