I got the Powermatic "S" curved bowl-turning tool rest when I bought my lathe, and it hasn't seemed to fit anything I wanted to turn. I also don't like the large flat area to work from, especially in the tight parts of the curve.
I did a bit of asking around locally, and it was going to cost me nearly as much to have some bowl rests made at a welding shop as it did to buy this one on closeout at CSUSA.
It's the adjustable length modular setup from BestWoodTools. It's comprised of a post, a support block, and two curved bars (soon to be three, when the third one gets here). So far I have the 3" and 4 1/2" radius bars, and the 6" radius bar has been ordered. CSUSA was out of it, so I ordered it from the manufacturer. I can also add straight rests to the post (which I'm already pretty well set up with), or flat box-turning rests (seriously thinking of getting one of those).
The whole setup seems to be well built, and things stay put when you adjust them. The support block is well designed and reversible, so there are a variety of ways you can set up the different bars.
Attachment 18212 Attachment 18215
And a couple action shots working on an ash root ball tonight. BTW, before anyone busts my chops for having the tool rest so far away from the wood, the first pic was taken when I was using my Monster beatin' stick (the Indexer w/handle, plus the 3/8" straight bit from the Monster hollowing rig) while roughing things out. Because of the 3/8" cutting tip and its holder, I prefer to keep the tool rest a couple inches away from the wood. By the time I took the second shot I was using a bowl gouge.
Attachment 18213 Attachment 18214
So far I like it. It's the first time I've experienced a tool rest with a smooth, even curve like that. Glad I got it, but still wish I had the tools and resources to make my own like some of you guys do, though.