I think that that bottom row would be doable, but reversing the numberpad is a little of an issue since the 2u "0" and enter as well as minus interfere with the 1u keys because of alps+MX compatability and how stabilizer cutouts on the PCB will most likely overlap the switch solder pads. I might need some time to figure that one out, but I think I might give that a go if round two happens. Have one left and one right compatable numberpad PCB.
Yeah the bottom row didn't look to difficult to do, but I thought the numpad mirroring could be hard. If it can't be done it can't be done.
Since the numpad can be all 1u keys though people can do a kind of "pseudo" mirrored numpad.
One last change that I think would be pretty nice would be to allow the left shift to be either 1.25u + 1u OR 1u + 1.25u. If this and the option for all the bottom row modifiers being 1u keys, people could tuck the left set of arrow keys farther into the keyboard. This would stop it from interacting as much with the numpad enter key, and people wouldn't have to learn a new Enter key placement to use it.
This also makes it so that people can use a 7u space instead of the 6u space with the left arrow keys, and a 7u spacebar is far easier to get than a 6u. I forgot how numbers work. Both 6u and 7u work fine.