Been thinking & planning. Plan is to get a refurb unlined drum from Container Distributors and a 22" weber kettle from craigslist. gonna take the kettle lid to the drum place to try & get a good fit.
Gonna drill 3 intake holes - cover 2 with fridge magnets and a ball valve (with fat belly mod???) will drill 3 grate support holes for each of two grates - gotta recheck the height of the grates.
I have an ECB pan that I think I will put a bail on and will use for an ash pan - my charcoal bucket will have the charcoal grate from the 22" weber that I will buy as the base and a couple of bolts sticking down as legs.
Since the UDS is a low temp device, I think I will use galvanized hardware EXCEPT for the charcoal basket - that is the only part that gets anywhere hot enough to vaporize zinc (it melts at about 780F and boils at about 1665F)
Comments from you guys with more experience than I have would be appreciated