I like the visual aid original thread post here. Nice topic Too.

My experience with ideal temps required to remove bearing from casted aluminum nitro engine case is 150C/300F max. I find higher heats unnecessary and prefer leaving engine case in oven an extra 15 minutes (as some times required) allowing the casting with machined bearing surfaces to expand thoroughly. Manufacturers assembled press fit is 0.0002" thru 0.0004" (Just a few tenth of one-thousandth of one inch. Utilize your temp gauge with this procedure and avoid bringing engine case temp above 200C/400F as case will distort as alloy becomes overly malleable with extream heat....especialy above 250C/500F.

Cocidering replacement costs, Actual peak bearing performace/bearing longivity is in my opinion the nitro engines weakest link at this time.