I've been using the pin rest during roughing the interior of bowls.
Because I'm using a standard straight grind for this, I can't get the bevel to rub as I "round the corner" near the base of the bowl. Instead of switching gouges to a different, or double bevel grind, I've gotten into the habit of using a pin rest. This allows me great control of the tool without necessitating the bevel to rub. It can get a little tricky to learn this technique, but once the principles are established in your mind, it's like anything else......follow some basic rules, and it will be a useful technique to have in your "bag of tricks"!
No real "rocket science" here!
I realize others have their own ways of handling the difficulties of roughing out an interior curve, and that's ok. I'm not trying to say my way will be best for everyone.......just that it's the way I, and a few other woodturners have evolved to.
The first photo shows the pin rest as it was a few days ago. Even then, there were some mods that I did about 15 years ago! The rest itself was originally square shaped, and I ground it to be more a triangular shape.....along the lines of many common wood lathe tool rests.
The second photo shows recent modifications to the pin rest. The post was removed, and repositioned to the end of the rest. This gives me a better "reach" into the interior of a bowl. The original pin was shortened a little for better clearance. A second pin was added, and will be used on the last, or furthest hole from the post. This pin is surrounded by a big thick fender washer. The purpose of the washer is to provide additional support when the gouge is at an extreme angle to the supporting surface of the tool rest. I've added a stop collar with (don't know what you call it) finger screw* adjustment. This allows me to rotate the pin tool rest on the banjo while maintaining the current height setting.
* Edit: It's called a "THUMB SCREW", dagnab it! (I didn't have the right size thumb screw, so I made my own for the stop collar out of a bolt that I did have!)
None of this is unique to me. I've seen photos right here in the members galleries of others who are using their own versions of pin tool rests. I suspect most people who try it, decide to not pursue it, because it's not really a better way of doing things......it's just a different way to do it.
ooc