let me guess, dry, dusty and chewed the edge off your tools something awful!
Go to the top of the class, Bryan, 100% correct, so far. There was, however, one other problem. I used my Simon Hope end-grain straight hollowing tool, which is ideal for this sort of job, but which I still struggle with to get a good clean line down the inside of the wall. I ended up with a curved tool-rest inside the bowl and a hefty curved scraper to get a good 'line' down the wall, but that was just too scary because it snagged twice (yep, I didn't learn first time) and then the tool got thrown back at me. At that point, I swapped it for a much lighter sheer-scraper mounted into my chatter-tool body, which worked brilliantly.
One other dilemma was what had caused that iron-stain. When I was cutting up the lump of burr - which came as an 8ft length of 6x6 - my chainsaw touched base with a flipping great iron gate hinge, completely embedded in the wood.
SO THIS BOWL OWES ME.....it had better sell well, and soon!
Les