I'd like to chime in to point out a minor problem in the base kit regarding ISO support.
As the kit stands now, you've got neither full UK ISO support nor US ISO support, but are instead falling "in the middle of the pond", producing something called "Atlantis ISO". To fix this in the base kit, you have two (ok, three) options:
1) Complete the US ISO support. To do this, replace the R3 #~ key with an R3 \| key instead. the R4 \| key has to remain.
2) Complete the UK ISO support. To do this, do not remove anything, add the three missing keys in R1: `¬, 2" and 3£, and add the missing key in R3: '@.
3) Offer full UK+US ISO support. To do this, do not remove anything, add the three missing keys in R1: `¬, 2" and 3£, and add the two missing keys in R3: '@ and \|.
Hope this helps!