Wowbagger
if your looking at getting a clamp based system that can do really low angle's look at the TSProf and get the double and single fillet clamp's and reinforced spring's.
I'm on a few facebook groups and a guy messaged me because he knows I have every clamp that TSProf makes and wanted to know what the lowest angles you can get on a TSProf system,he only had the standard clamp's and didn't want to buy fillet clamp's if they wouldn't work for him.
These are the angle's I got using an aluminum edge pro blank put the clamp's.
I got 9 degree's using one double clamp with a half inch of the blank sticking out and I got 7.9 with 3/4 sticking out.
With the single fillet clamp I got 7.9 degree's with half a inch sticking out and 7.7 with 3/4 sticking out.
I used a Venev OCB stone witch are thinner and the thinner the stone the more you'll struggle with getting lower angle's,at those angle's posted for all the clamp's there was about 1/2 to 3/4 of a millimeter of clearance.
I would like to see all of the company's that make guided system's come up with a standard way of testing the lowest angle's of the sharpener's,for example using the 1/2 and 3/4 measurement of the the blade sticking out and using a 6mm thick stone,I not going to name one sharpener that I know of that claims to get really low angle's without hitting their clamp's but that's also base on you sharpening a chef knife.