OK... sorry for being confusing. I have explained this before but it's spread around the thread in several posts so I will just summarize the situation.
Originally we were going to have them made with KBC Cherry thicks like my previous PBT groupbuys, and the OP still reflects that. Then I found out it was possible to get PBTs from another source, PLUM. Plum makes their own keycaps, and uses Cherry thick on the Neo Zelia, and Plum96 models. They also make the Choc mini - which is where the 1.5 and 1.75 would have come from. Unfortunately they won't offer those keys to other customer at this time... I guess the molds are owned by/exclusive for Noppoo or something like this.
Regardless if go with KBC or PLUM... now we have the same key selection, same limitation there... but PLUM has a smaller MOQ which is helpful. The dyesubbing is actually like a 3rd party service with imsto, so it dosen't really matter to them where the keycap is from.
Now where GMK comes in, is neither PBT source can supply us with 1.5 mods, 1.75 shifts, ISO enter, 7x spacebar or nice windowed lock keys. So either we can use a few ABS keys to make the set work for some more keyboards or have nothing... I will let buyer decide by offering a choice. If you want the GMK ABS extras, it will be separate item for extra cost so you can get them if you need/want them.
I hope this explains better what is going on and makes sense to you all.