Unfortunately I'm the wrong person for that as I love it! I've been lazing on a lounger in the sun for a lot of the day!
Anyway your last post reminded me why I do build diaries, so much appreciated!!! - I'd given no thought to the string spacing whatsoever. I went on the fact that I'd used the same neck template as last time, the same nut width and the same bridge therefore all should be fine. As it turns out that isn't quite correct though I think I'm ok.
The nut width is the same as my last one. The width at the 20th fret (the last one was 24 frets) is exactly 60mm with 50mm string width - again the last one was 50mm string width but 62mm wide neck. The last one is fine to play and I don't think the 2mm will make too much difference, there is still a reasonable gap either side. The bridge is 57mm string width on both. I got my Jazz out and the nut is slightly slimmer (38/39) but the other measurements are the same. I think I'm ok to be honest. I have the option of cutting the nut slots just slightly closer together though I'd have to be careful as i want the gap between the edge and the string to be uniform all the way down.
I set it up using (fat) string and it seemed ok. If it's not good then I'll have to swap the bridge out for a smaller one in terms of string spacing.
This is definitely something to consider in the planning and in hindsight I need to have the all the bits available during the design phase.
Building guitars is learning right? Presumably there is no point at which you say I know everything!!!! Maybe one day I might be able to help others - at the moment, not so much!!