As promised, here's the hollowform I turned yesterday using my new toy, the Crown Revolution hollowing system with my custom made handle. I finished it on the lathe with polishing mops and carnauba wax this morning.
It's a two piece hollowform, as per the demo at my woodturning club last week. The shape is roughed out, then it's parted into two with a tenon on the top part. The main bowl section, and the neck part, are hollowed out separately, with a mortise formed on the bottom part to accept the tenon in the top part. Then the two pieces are glued back together (I used medium superglue) and the shape is finished. The join is disguised with some strategically incised rings, burned in with a guitar string.
The attraction of this method is that it's more easy to turn a piece with a narrow neck, and shavings can be cleared much more easily. Some attention is needed to forming a good tight joint as you need to do some turning on the reassembled piece, and with grainey wood you need to line up the grain as much as possible when reassembling.
One benefit is that if you make the neck narrow enough other turners can't put their fingers in there and check the finish inside
Anway... here it is. Good fun to make. I managed to line the grain up reasonably well. It's just over 6" tall: