hi could some1 please help.i took the wheel of the tdr pro 150 to change the back tube.my little boy was playing around andthink has lost some pieces.ive the rear shaft and two spacers big and small.any 1 help me with how i fit it back together with the rear brakes.pics or anything will help me or even where i could get a diagram its really annoying for the kids they want to go for a spin:cheeky-smiley-031: