I wanted to add a rotisserie to my UDS but was wondering do I need a kit with a ring or could I just drill to holes in each side of the drum to mount it that way.
Personally, I would use a ring. I like to make sure its balanced and the best way to do that is to set up the Rib-O-Lator on a flat surface.
Maybe its just me, but drilling into a drum with a setup like Smoker Kings puts a damper on the cooking process. I like to be able lift the whole setup out to turn the meats or add, remove or baste items, and the idea of doing it over a drum with the lid open for any length of time just does not appeal to me. I'm not knocking his setup-it looks well made but its just my opinion.
Whatever you decide, make sure the spit rod is square and not round stock.
My dome top does not seal like the Weber tops, etc. And the way the ring top seal is designed
for the Rib-O-Lator, it would never work with my cone top.
So, in my case, the ring was not an option.