AM Shifter Assembly Question

[haroony341]

hey, i have another question about the gearboxes,

there is no room for us to be able to mount the gearbox lever with the wheels, so we had to mount the gearbox about a foot higher than its ideal mounting spot. now we are having problems with the chain, first we had to mounted upside so we could hang it from the top of the frame and to avoid the chain from grinding against the long (15 tooth?) gear. but the chain is also grinding against the spacers and screws in the corners of the boxes. is it safe to pull them out? what are other things we can do to stop the grinding or ease it so there isnt as much resistance.

thanks!