Hey Steve, its actually apart of the top sheet (form ply) extended past the end of the whole fridge trolly/rack setup. Its been jig sawed out, and then a piece of rubber tubing insulation (cut down the middle) and run around the cutout and glued. This holds the bottle firmly in place so it cannot fall over, or be pulled out by kids etc. To get the bottle out you just give it a squirt of water and it slides out. Its bloody great.
The bucket is to run the first bit of beer into it so it dosent go over the ground. Because of the difference in temp of the tap on the outside, and the beer coming through it, it foams ever so slightly for about 2 sec the first pour. I just crack the first bit into the bucket and let the dog have a slurp. Im still trying to get my drip tray organised, this will hopefully solve the problem. I also use the bucket to protect the reg etc as there is a slight leak (in the undercover area) in the vicinity of the bottle and reg. Killing two birds with 1 bucket
.
I also made up the step rack inside the fridge aswell (under the kegs - The black formplay) so I can fit 5-6 kegs inside.
Overall, im pretty chuffed with the whole lot, even more since in recently setup my temp controlled brew fridge (far left). Making the beer trolly/rack enables me to keep the fridges off the ground so I can easily pull them all out as one unit to clean behind, and I can easily hose right under the whole lot. I have a Siberian Husky and she sheds her fur like no tomorrow.