Hey man, I've been away for the holiday weekend. The bolt holes for the top fasteners were easy to drill, I think I used 1/4" diameter bolts and drilled 5/32". That was simple with a nice new drill bit. I burrowed a set of bimetal hole saws to drill my fan portals (4 1/8") and my beer line portal (2 1/2"). I fastened my top to the lid of the freezer first, then drilled the larger diameter holes. I started with a pilot hole drilled all the way through the plywood coffin base, through the metal skin of the lid, through the insulation of the lid and all the way through the plastic liner of the lid. The larger holes were a b*tch to drill because the bit kept biting once I got through the plywood base and hit the metal skin of the top. About broke my wrist, so I lightened up on the pressure and let the hole saw do the work. Once I made it through the plywood base, the metal skin, and 1/2 of the insulation, I then started drilling from the under surface through the plastic and the rest of the insulation.
I wired both fans to a 14 guage extension cord that I cut and wired them to. I used a dual input/dual output temp. controller (TSS2), so the fans plug into one outlet that is controlled by the temperature probe connected to channel 2 of the Love controller. The compressor plugs into a seperate outlet that is controlled by a temperature probe connected to channel 1 of my Love controller. I like having independent control of temps for coffin and the freezer compartment seperately. Hope this helps.