Bubba- the brethren seem to want something more than magnets and go to all the trouble of three holes and a bunch of galvinized or zinc coated hardware for their UDS. All the barrels I do for people are going out with magnets and the new owners love them. When you have one hole the fire is so easy to control whether your runnin' at 400 or idling along at 200 its all there on one hole. I use speaker magnets as I can bump them with my toe to adjust the temp. The only addition I make to my barrels is I run a 1 1/2" pipe to the centre of my barrel(under the centre of my charcoal basket) I don't know why but with the air drawing from the centre I never seem to experience a need to shake my basket during a cook.
I do love reading this to see new ideas from the brethren. That Tyler with his powder coating sent my mind whirling LOL!!