i just finished grinding the case open to fit the MASSIVE cylinder and piston. aside from the transfers, not only do you have to grind the case to fit the width of the cylinder skirt. you also have to grind a little more inwards so that the piston skirt doesnt hit the case at bdc. it wasnt too bad though. id say it added up to about 4 or 5 hours of grinding. maybe more but i did it over a span of two days. its not that bad really, done nicely with a dremel and carbide bit. my next step is to put the jug on, stick the engine in the bike. assemble transmission. then after that i have to figure out carburetor configuration. and fitting the pipe on the angled exhaust port (this part scares me). i cant wait to rip the streets and pass cars and carry passengers though