Thanks guys
And
Gage I allowed 1/4" on each side do you think it's going to be enough?

theres no problems at this point opening and closing the lid, do you think there will be any after I install the two layers of 1/8" bendable plywood and the 0.50 alum skin. I am using the 1/8" due to the excessive bend at the bottom and I don't think I will be able to install 1/4" without some problems with it trying to pull the bottom up off of it's seat. Any comments on this is evry welcome, and again thanks.