Hey Jetlink, I am looking to do a wheeled base on my already existing keezer and yours looks pretty simple based on the first 2 pics of this thread. I figure I can do what you did and put a border around the bottom attached to the base since I only really care about being able to wheel my keezer around. That way it will cover up the gaps and hold the keezer on the base in case it was knocked.
My question is, how is your base holding up? I just wanted to make sure having 5 full kegs in a 7cu ft keezer is not going to be too much for something like you have. It looks like you have a decent amount of weight on it but figured I would ask.