A little more progress this morning.
I decided to go with 3/4" vent holes instead of a single long narrow slot as was suggested by spareheat in my previous post. I figured I can turn those holes into one long slot anytime. The slider which is sandwiched between the drum and the outer plate is snug and solid, not loose with good action, so I'm not worried about leaks.
I'm just waiting on my 48" x 48" expanded metal to arrive today so I can do the basket, grate, and ash catcher assembly. Then I'm ready to get this thing dirty...:)
....UDS....Mini-WSM....Midi-WSM....Mod-ECB....22.5-OTG....34"wood fired pizza oven....