Well OK, I am at a point where I need feedback.
I realized I am missing one key in the "non ISO-UK" basekit for supporting ISO.
So, the alternative to the cheapest ISO support is probably ISO-US, which means adding one pipe and backslash 1u key next to enter, and changing the iso key next to left shift to ~. This layout is probably not used by anyone, and some argue the kit is better off without ISO support altogether if that is the alternative.
On the other hand, I have a quote out for ISO-UK that has one key different - which can be changed but will mean a more expensive base kit due to more keys for full ISO-UK.
What do you think? Should I make a base kit with the cheapest ISO-support (ISO-US), or offer ISO-UK in the basekit, or remove ISO altogether?
I really need some feedback on this. Thank you!