actauly i had it working for a short while last year with a differnt belt setup and it worked fine until the belt eat up my plastic gear on the axle. i was using a vacum cleaner belt. the engine mounts mount to the white bars underneth so it is quite sturdy. i would like to build a chassis from alumminum but i really don't have the money to do all that. i build my costums from mainly from stuff i have just laying around. but i will post more pic of it latter. thanks for the link about the chain and spocets, i will be checking that out.