Originally Posted by springer
I cut the hole by making a template marked out the hole then using a 1/2 spade bit I drilled the four corners then used a skill saw to remove the plug.
Nice build! Wish I had done mine with as wide of a collar as you have there... I'm a fraction of an inch too short to fit a fourth keg on the freezer compressor hump (I still do so, it's just a little too tight for the lid to close all the way, so I have to press it down with something heavy)...