I'd like to point out that there is one key missing ('@ in R2) for UK ISO in Dvorak which is included in neither kits :/ I understand that it's a very minor edge case but you know..
frebibDC kit is actually designed only for US layout. But anyway i noted this. If we go with it into ISO world then we get the same story as with ISO kit :/
wlhlmMy fault actually i read your comment that time and i knew it. But i forgot it. Anyway its to late to add this key as it will change the price of current drop.