Checking in on this set again — WOW, I have to say it looks great now! That light blue accent really made all the difference. The deskmats look really nice as well.
I did notice a small issue with your base kit, though: you have R1 End and R1 PgDn keys for 1800/CP compat, but they can't really be used without a numpad. Would you consider moving those keys to the numpad kit, and adding R3 PgUp, R4 PgDn (popular options for 65%/75% layouts) to the base kit in their place?
Also, are the triple F and J in the base kit: scooped, barred and regular? If so, do you think it's worth offering the regular F and J at all? I don't think many people use non-homing F and J keys.
Finally, don't give in to Emir's demands, he's been getting his way a bit too much lately
I think the padlock caps works well with the set — keep it!