To make the 1/4" back strong enough I cut a strip of 1/2" ply just wide enough to fit between the cheeks and sit flush with the top and bottom, then installed the back over it. Routing was done as a unit, but before the back was installed on the cab. The four screws that hold the handle on use T nuts, the remainder use 1/2" screws.
http://www.partsexpress.com/pe/showdetl ... er=262-826
