I fixed the base kit, adding full support to 96 and 1800 keyboards, swapping iso keys and adding the loved magenta accent:
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I don't mean to be a prick, but the change in the "ISO alphas" keys has taken a turn for the worse. In the initial kit, you had R3 
\| and R4 
\|, but you now have R3 
<> and R4 
#~, which is... incorrect in all lights. I'll detail:
In a nutshell, "ISO alphas":
- English (US), terminal style: R3 
\|; R4 
<>.
- English (US), PC style: R3 
\|; R4 
\| (this was what the initial kit had).
- (Full) English (UK): R1 
`¬¦, 
2", 
3Ł, 
4$€; R3 
'@, 
#~; R4 
\|.
- English (UK+US): R1 
`¬¦, 
2", 
3Ł, 
4$€; R3 
'@, 
#~, 
\|; R4 
\|.
- "Partial British support" 
(or "Atlantis ISO", although that term is now forbidden): R3 
#~; R4 
\|.
The kit, as it stands now, has one key from the 
terminal style (R4 
<>) and one from either UK-intended set (R3 
#~). I would suggest going with the terminal style; another option is to do what a couple sets have done and use:
- "Appeasement ISO": R3 
#~, 
\|; R4 
\| (three keys instead of two). This would cover "partial British" and "US, PC style" at the same time.