Alright, lesson #1 on doing lots of curved piecing... be prepared with a bottle of painkillers about 2-3 days in for when your hand cramps up. Especially if you're up against a deadline :-( I missed that memo and am headed into day 2 of hand/wrist pain, but starting today day with said tool. But here's a hint of what I've been working on...

(please ignore the puckering in the center... it's since been taken care of)

An addendum...

Seems to be working so far... or perhaps the day or two of rest helped a little too!