1800 support and 2.25u left shift is something I want to do for sure, but the cost wouldn't be the same.
I think it would be a good idea. The market is saturated with PBT sets that only supports standard layouts. I think that's the reason why there have been so many successful GMK group buys over the last year, despite how expensive they are. You know your keyboards will be supported. I wouldn't mind paying GMK prices for a PBT set if it meant GMK support, such as 1800, HHKB, 1u Alt, 1.25u Alt, 1.5u Alt, 1u Fn, 1.25u Fn, 1u Ctrl, 1.25u Ctrl, 1.5u Ctrl, 1u Menu, 1.25u Menu etc.