Yeah, the issue with that woodpecker gizmo is that eventually you have to take the stack off the gizmo and install it on my cute, little arbor. 

I can get the stack square on the bench (I milled down the threads on a bolt so it’s perfectly 5/8” dia, letting me stack the blades). But what I want is a piece of tube stock that I can stack the blades on, then slip over the arbor threads (hence the need for ridiculously thin walls), then tighten the whole stack up leaving the tube in place

I think I’d need several of them, almost one for each 1/8” increase in dado width…

Honestly, what I’m probably gonna do, is buy one of the CMT locked dado stacks when they come back in stock. The blades fit together so they don’t move independently, which should fix my issue. 

Ryan/// ~sigh~ I blew up another bowl. Moke told me "I made the inside bigger than the outside".