........because the hollowed inside of the box is completely inaccessible due to the chuck being in the way, how do you know how much of the outside to remove such that you leave the wall thickness you desire?
The only solution I can come up with is to constantly remove the work from the chuck and measure with calipers before remounting.......
.....although I suppose you could make a template of the inside (after you have turned it), allow an offset, and thus generate a template for the outside. I'm sure if this was the process, you would have shown it!
Mike the outside is turned while the body is mounted on the chuck as in part 8 (see image below) so that I can feel the wall thickness while I'm turning. The body is only remounted in this position once I've shaped, sanded and finished the main part of the body so that I can finish the foot the way I wanted too, without the spiggot, or a recess in some cases.
I probably should have taken an interim photo showing the body shape complete before remounting.
If you don't mind me saying you would find it easier if you had a hot glue gun, you could use this to mount the base of the pot to a scrap timber thus removing the risk of marking the inside edges of the pot when you reverse mount it to finish the base and the lid.
Thay cost pennies from Aldi at the moment, and you dont need to pay large sums for special glue sticks the standard ones from the same shop are plenty addequate
Of course your own method works just as well, and a really nice job too.
But wouldn't the glue affect the finish already applied to the pot?
I'm happy with the finish I'm currently getting, so long as I'm reasonably careful, but thanks for the heads up on the glue gun, think I'll pay Aldi a visit in the morning.
Col the glue leaves no residue at all, you need to work out how much to apply or as i should say, how little, leave intill cold and in most cases just peels off. a hand pollish after is sometimes necessary,
The gun is £2.49 and a pack of glue sticks is £1.99 a bargain. and it is supprising how easy it is to get used to.