@clinton

borrow his 12 inch tom drum

My OCD engineering mind has gone into overdrive now. Isn't a 12" drum going be a 6" radius, rather than the 12" radius you want for your sanding blocks.

@robin Wow you are right! Just measured my bass drum where I made my blicks and measured 24 inches. Learned something new.

Wrong info everyone thanks to @robin. You need a 24 inch bass drum not a 12 inch drum to make 12 inch radius blocks.

@clinton

Thanks for clearing up the drum size thing, I can relax now.

My OCD engineering mind has gone into overdrive now. Isn't a 12" drum going be a 6" radius, rather than the 12" radius you want for your sanding blocks.

@clinton I didn’t notice until @robin corrected you, I should have listened more in maths at school! 🤣

@boo I know right? Phew thanks @Robin

Having only radiused 3 necks I probably can't add much to the excellent advice already given (I clamped the neck, used a short radius block, and check with radius gauge frequently) but one thing I did notice - when I was following the centre line correctly, the sawdust marks on the block were even, which gave me a very quick visual clue.

I saw a video from Crimson yesterday (are we allowed to mention the competition?); before radiusing Ben put a pencil mark along each side of the board showing desired finished thickness. Again, this would be a good visual clue.

The thing I have to remind myself is that all the YouTube luthiers have been at it years and have 'the power of edit'. If it takes me all day to do something a pro can do in minutes then so be it - I've spent the day doing something I love (unless it's fret level, crown, & dress).

That fretboard looks very cool btw.

the sawdust marks on the block were even,

That's another excellent tip @rockpile99.

@rockpile99 Thanks for the additional tips!  I like the sawdust in the center of the block tip, as well as marking the edges of the board with a pencil to see when you've accomplished the correct thickness.