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14in diameter 15 gallon drum $15 - C’List
Knock-off Weber Mini Grill $15 - WallyWorld
2-Weber "Smoky Joe" Cook Grates $8ea - WallyWorld
Dollar Tree Pizza Pan Diffuser $1
SmokerBuilder MFG Draft Tube $35
SmokerBuilder MFG Charcoal Basket $35
SmokerBuilder MFG Thermo $25
Misc Hardware and Paint $10
Use 3/4in long 1/4-20 or #8 screws as anything longer is a hassle for getting the grates in and out, maybe 3/8in of clearance
A UniBit is great for making the diffuser pan, but the metal is crazy thin, my bit was not very sharp, and melted its way through

The lid hinge is pretty flimsy, but seemed handy, so we will see how long it holds up.
I put the top grate 2in down. I put the 2nd grate at 8in down to avoid the barrel rib, but I think above the rib would be better. 3rd grate is about an 1.5in above the charcoal box. The spacing is tight, you only have 24in to work with and the charcoal basket is 12in tall. The diffuser is critical to cut the radiant heat down. I think on v2.0 I will mod the legs on the charcoal basket so they are an inch shorter and move the bottom cook grate an inch higher. The goal is to cook 2 small butts or chickens. I have a 55 gal UDS, but the little guy would be handy for small cooks or camping out.