Hey Jakobud... thanks for the comments! Here's some clarifications:
1.) There is absolutely no reason that I can't offer the restrictors in the dimpled black finish. My original thinking was to create a contrast between the black mounting plate and the restrictors, and the stainless finish does create a nice contrast. I'll update the order form to include a black finish, and also to order the mounting plate as a "blank" such as I used on the HotRod.
2.) The 2 new restrictors are a diagonal style (Q*Bert, Congo Bongo) and a rotating 2-way (horizontal and vertical with the same set). They will use the same mounting pattern as the 4-way's so prior customers can use the new restrictors, too.