Just finished mod'ing my UDS. I took the bottom of a 22-1/2" Weber and am using it for my lid. It is deep enough so that I can run my home made Rib O lator under it without having to put in an insert.
Since the lid is now pretty heavy I decided to hinge it from the rear. Yes, that took me most of a day to make that puppy. It looks strangely like the hinge on my BGE.... but it works great. The lid will stay up without the need for a spring.
Now I've got to finish up the paint and get cookin'