I have a duddle bug it's an aa when i got it. it had just been throwen togather. I need the crank hole guide top and bottom and u bolts can find for a but not for aa. the a book talks about a round top and squair top i don't have any idea which one i need. i have never done a model a or aa truck before can someone tell me what i need and where i might be able to buy it.(new or used)