After seeing the mockup for a few minutes each detail of the design adds as another reason to get this set, while thinking, well it should have this, I found the feature included and felt like I have to get it. Congratulations! the design rocks!. Now our keyboards may be reminiscent of the space exploration.
One minor suggestion, that is more aspirational than an actual need, is a 1u Alt or Alt Gr key; otherwise, if you want to provide support for 1800 you will need all the modifiers in 1u; however, the priority is to keep its price low to get as many interested parties as possible, turning into buyers.
Take my money!