To expand on hollow grinding, you will get two registration points on the bevel, making easier to hone as less material is removed. I do a slightly altered side sharpening, more at a skew angle (edge of blade to length of stone). I’ve been doing it this way for decades and is very quick and ultra sharp!I recommend you get a slow speed grinder and hollow grind plane blades. Then practice the side sharpening technique. It’s the method I use and can vouch for it.
I only use my jig for sharpening expensive Japanese chisels. I don’t hollow grind them because every particle of steel is precious. Using the guide allows me to remove smallest amounts .
If he doesn't take it, I will. I'm in Florida, zip code 33903. Paypal? Venmo?