Very nice work. Just a heads up. I have this same freezer and you are right it will easily fit 2 cornies or 1 corny and a commercial sixtel but it will not fit 2 commercial sixtels. I found out the hard way.
I am in the process of a similar build with the same freezer. I had not considered the double hinge idea, but now I think I will go that way. What did you use for the hinges? I assume you kept the original freezer hinges for the bottom collar and got a second set for the lid attached to the...