Okay, so I took another look at the orange mod kit.
I believe we're still missing this small cluster of caps:
The R1 Home key is particularly important for a 75% column consisting of:
R1 Delete
R1 Home
R2 PgUp
R3 PgDn
R4 End.
Aside from that, I have a question:
What layouts are these R1 End and R1 PgDn supposed to be used with? I can't think of any off the top of my head. These two caps are also present in the orange mod kit