1/4 inch ring fit inside the drum for good fit to the roti, 1/8 inch ring on the outside of the 1/4 ring for good fit to the weber lid.
I appreciate the word craftsmanship. Pleased you like it Dave and dirtsailor! I'm going to do a dry burn shortly.
Dave I have one of those ring rollers. The 1/4 x 1.5 was rolled to a larger radius than the id of the drum, then forced into place as a spring and the joint welded. Made a factory like fit to the roti. Then the weber lid fit kinda loose on the 1/4 but the 1/8 x 1/2 rolled around and tacked to the od of the 1/4 made a nice snug fit for the top. Didn't need to fasten the extension to the drum, it's a drive fit. The lid was a nice fit to the bottom of my drum but there was too much to make up for a fit to the rotisserie ring. Originally planned to use the bottom of the weber welded to the original drum lid for a top because I liked the high bullet shape but stumbled on the roti rig before cutting and welding commenced.
Thanks Dave, means a lot coming from you! Dry run tested out great on atmosphere. That big gate valve affords minute adjustments.
Then I put the fan on it----- Not doing any better on the 55 than it did on my 30. More experimenting to do I guess. Don't really need it for temp control on a UDS but the remote monitoring would be nice If I can ever get it to work right.
Got it to settle down for a couple of hours after several adjustments, had to use a choke on the blower. The first section too hot, was open blower and trying to control with the exhaust as indicated by Flame Boss.