You could remove the seal from the lid and glue it to the bottom of the collar. Then silicone the lid to the collar, and secure with brackets inside.
That's one way I've seen it done, and until now, I thought that was the norm...
I just used 100% silicone to glue the collar to my freezer, and hinged the lid to the collar(2"x10"). The collar's weight plus the silicone holds it down nicely. I don't mind lifting the kegs another 10" or so, and I only have 3 taps that don't really get in the way. Just make sure the lid seals properly. Wood is almost never exactly straight. I sanded the hell out of mine and put a thin bead of silicone around where the lid rests too.
My friend did the same, except his lazy ass mounted a little pulley on his ceiling above his keezer. Actually... it's kinda smart and no one really notices. It's hidden behind a beer sign hanging from the ceiling.