I too am surprised you’re barely seeing this given your track record lol. Your comment makes it sound like there is no 65 compatibility. I mostly use 65s and imo all the keys needed are in the base kit. For the right column on 65s/75s I typically go R1 Home/Delete, R2 PgUp, R3 PgDn, R4 Fn/End. If I have a top right blocker/badge 65, then sans Home/Delete. If it’s a 65 with a 2u blocker like Think65 variants or similar, then I use whatever keys available since that is such a weird layout. On top of that, we can always remap keys to whatever we like, even if one or two caps don’t match what’s under the hood. Furthermore, Cosmos is a very low contrast set where the legends shouldn’t be deal breakers. I also offer the blanks kit to cover anything else. You can even fill that right column with artisans. I promise I tired to cover all the bases and make as many people happy.
Were the keys I mentioned included in an earlier draft of the kitting? I could swear I took a gander when you first posted the IC, was like “set looks great”, even told a few friends about it — only to come back yesterday and see that they're missing.

It's quite possible that I mistook some other two R3/R4 keys for my beloved PgUp/PgDn, given the low visibility of the legends (especially back when the colors were flipped). And yeah, you're right, it won't be that noticeable, and blanks are always an option. I'll live.
By the way, the reason why I'm such a big proponent of that particular right column setup is that I always use split Backspace on everything. In that case R1 `~, R2 Delete, R3 PgUp, R4 PgDn just makes too much sense, and it's what I've been using ever since I got into the hobby (65% being my daily driver layout for most of that time). I did this little
analysis a few years ago, and back then it was super popular. It would be nice to redo that analysis with the updated qmk_userspace repo and see how usage trends have evolved over the past 3 years; I might get around to that sometime soon.
Anyway, don't mind me. Keep it up, looking forward to the GB.
