Yes makes sense - there's a couple of scale length/fret calculators out there (Stewmac and Manchester Guitar Tech iirc have them).

I must look into Sustainers as well at some point - I'm guessing they are similar to my beloved e-bow?

I've always fancied having a go on a Chapman Stick and didn't realise they use a separate pickup coil per string. That's very similar to the Gittler, which is another concept I've had in mind to incorporate into a guitar design.....so many ideas...so little time :)