I bought a roller tmaxx for my sons bday , it came with megatech .16 . I had to replace the oneway roller bearing and put a pull start on it . I was pretty impressed with the megatech with pull start wasn't to hard to start and ran a tank of fuel threw it . The megatech runs pretty good not as much bottom end as .25 but not bad and semms easier to tune than tmax engine . 
