like the lightness- but I always found balance really important for me- 'neck heavy' always made for quicker/easier cramping fingers, achy wrists/elbows-
and I always preferred "flatter" instead of 'well rounded' neck...
but if you ever are down south with your bass- I'd love to have a go
like your exercises!
I was never a "proper' player- started in the diletante punk days- so never did any of that-
and although I can read music a bit and can transfer this to a keyboard- I never learnt this- lazy! couldnt be bothered- on guitar/bass- I always just played by ear and with time just let muscle memory find the right notes
and yep, bass centre is a good place- shame they dont generally stock the ashbory- or do they sometimes?