Originally Posted by Elfmaze
I would love to figure out a hinged lid like you have but my one Weber lid doesn't even seal correctly yet much less be hing-able.
Here is a link that shows the hinges I used. For the lid in general, you will either need to grind down the rim of the drum or flatten and reshapen the lip of the Weber lid. I have seen some people make hinges for flat lids too.
Edit: Totally forgot the link
Also, here is a link to another cart I built. Way to heavy duty for my needs and I barely use it. Actually thinking about trying to sell it. Anyway, perhaps you can get some ideas from what I added to this one after building the first one.