Argh!!!!!! Just turned the next piece of this ash...disaster! It was destined to make a wide, open bowl that this would have sat inside - perhaps 11" diam x 10" deep. All went well mounting the block and it wasn't too out-of-true. The outside shaped up well and I left a substantial amount of wood to support the base. Once I was happy with the line of the curve, I chucked it via a 4.5" spigot that I 'd turned for my deep-jaws chuck.....then it all went wrong.
Firstly, there was and area of bark that just would not stay in place. after 2 attempts to glue it back, I gave in and peeled all the bark off. Next, the bowl wall, close to where the bark was splitting away, cracked and a lump came out. It became so bad that I took a hand-saw to the bowl and cut away all the ups and downs of the natural edge, and was going to settle for a much smaller bowl. Even that was not to be! The bowl-wall just kept cracking in the same are that all the other faults appeared. I couldn't see any hairline cracks, but there clearly was something wrong. Think I'll give up at this point....or settle for a saucer!
Les