Some proper mounting would be ideal, but i have no idea how you would get the drive spaced in the rear hole properly with out using goopfab a mounting plate for the Zip and a 2.5" SCSI Drive with little or no problem, that'd be easier and get rid of the angle.
Sculpey, Fimo, hobby plastics, Sugru. balsa wood, styrene sheet, Meccano, slotted bar, threaded bar, bolts & nuts, cardboard, duct tape ...with out using goop