I live in the USA,and parts are hard to come by here. I have 3 yokomo mr4,and building a mx4 from scratch. My question to u all is what parts are interchangeable between the mr4bc,mr4sd,mx4, and so and so.I was looken at the yea racing front hubs and the rears,and knuckles for the mr4sd.Do the bearing fit . Are the cvd from the mx4 the same size as the mr4bc? I just need to know what is interchangeable in all the models . Is there a web sits I can go to that has this ? Or can some one here help me.