Essentially you need to match your body neck pocket rout to the contour of your neck heel.
If there is a mismatch you can alter the neck pocket to fit the neck so there is a good contact maintained.
the most important joins are Heel into the body laterally on the upper horn side.
I cannot for the life of me remember either, I am sure I made reference somewhere an old one of mine was 15 hundreds - and I think that was around 2010-2012?
Thanks - I have a stealth - lovely flat profile and probably my fave neck is their Jazz bolt on - just a dream - only way to decide is to play i reckon!
I am a bit like happy jack though, i can live with most profiles