hi everybody, new to this forum but not entirely new to this tmaxx. bought it in '01 (classic) and somewhere around 02 or 03 upgraded to a trinity/picco .12engine. all I can say is it was a direct replacement of the .15 TRX that came in it; and it has a blue anodized head with the letter "R" on it. I've been scouring the web trying to find info on it but have had no success so I'm only left to trouble you guys. I've been thinking about re-upgrading the motor on this thing but wanna be sure it's a step up....not down. don't remember what I spent or anything else but, if need be, I can post a picture of it for ID purposes. thanks in advance for any info. If I knew more about this engine it would make it a lot easier to choose the next one.