Okay, here is where I stand on the DOT spinners. My only holdup right now is the tempered spring steel springs. I have sent them all over for pricing and they came back all over the map, some as high as $11/set! As I was sifting through the quotes, I noticed that not everyone was quoting the correct material, or thickness, or whatever. What a nightmare. I can't figure out why that happened, the RFQ & drawings clearly state this info, but anyway...
I'm tentatively setting the price of these at $99, knob not included. To be totally honest this is 5% above my cost, 3% of which will get chewed up by the credit card fees. If I work it out just right, I might just be able to keep one out of the first batch for myself.

I'm still in the process of beating up some of my suppliers for lower pricing, but I'm not having much luck so far. Obviously my goal isn't to make a load of $$ off of these things, I just want to get them out there because the BYOAC'rs have been asking for a DOT spinner solution before I ever made my first post on these boards. If I start bleeding cash too badly, then I may have to increase the price. However I am doing everything I can to try to keep it at $99.
Another alternative I'm looking at to bring the price down is to have all the flat stock fabricated by the older technology panel cutter/forming machinery in lieu of laser cutting. Many of the old arcade controllers, like the Tempest spinner bracket, are made this way. I am still investigating this (possibly) cheaper fabrication process, so I don't know what cost impact it will have. I can say that the laser cut pieces are a higher quality and more precisely fabricated part, so I will have to weigh the pros/cons before I make a final decision on that.