Here's the thread Bob
http://weberkettleclub.com/forums/grilling-bbqing/indirect-cooking-techniques/And here's a pic
I used an old 22 bowl, expanded mesh, a piece aluminum and some SS nuts and bolts to put it together, she ain't the prettiest but works a treat
I measured the distance between the charcoal grate and cooking grate and cut out about 2 foot of the kettle using the rim of the bowl and measuring down
I'm sure you don't want to cut up a 26er, and I think a 22 will be fine, once the piece is cut you should be able to manipulate it to the shape of the 26er
I cut out tabs on the bottom to attach it to the expanded steel and folded them over
Making one of these for a 26er would be awesome and can't wait to see how it turns out
I think you'll be impressed with how much fuel it holds and it seems to work well using the minion method too for low & slow