I have searched abit and cant find what I am looking for. Next week I am on vacation and want to dedicate a day to the Blasty. Looking to get everything needed to do the axle swap. I know I need the axle, going to get a 42T sprocket, and some 18 or 20" tires. What else is needed. D I need a hub or something like that? Is it as easy as slide one out and the new one in???