@Simon
Thanks Simon, the truss rod is a bit of the belt and braces approach. It’s there if I need it, but I hope I won’t. Being pine I thought I would play it safe as it’s not the most stable of woods.

@Gav T
Thanks mate, no need to be jealous of my non-existent skills, just have pity on my stubborn streak.

For measurements I just used the fret position calculator here:
https://www.stewmac.com/FretCalculator.html

I don’t own a fret slotting saw as they are too expensive but I did treat myself to one of these:
http://www.irwin.com/tools/handsaws/dovetaildetail-saw
I guessed it had a very fine blade as its described as a pull saw. I have tried it out on some scrap wood and I think it must just do the job.

My bro-in-law gave me some tools he no longer needs and one was a kind of mitre jig. It looks pretty sturdy and accurate so I will be giving this a go. I'll post a pic later.

Although the fretboard is very low quality wood it is dimensionally very square so I intend to measure and cut the slots before I do any shaping. I will just be using a rule and a try-square. I will have a centre line marked on the FB so I can line it up with the centre of the neck to keep it square then, when glued, trim the overlap to bring it back to the taper of the neck.

Being based on a classical style guitar the FB will be flat with no radius.

@Frankie
Thanks mate. You are correct, hopefully just like a bolt-on, with no extended neck heel.

@Scott
Crazy! Very apt choice of words.

@Dave
Thanks mate, I fully expect this build to be odd in all manner of ways.

Thanks again for the encouragement guys.