I purchased a "bargain" Baldor 500 Carbide grinder on eBay. It looked great in pics, but it went cheap as there was something in description about it not working correctly. I took a gamble and found out that the motor was toast - the windings in the field coils were shorted (it looked like a manufacturing error as this couldn't have seen much use. Also one of the end castings was broken. 

Not to be deterred - I found a place in L.A. that would rewind the motor for $300 and I was able to weld the casting back together. So I ended up with a pretty nice unit. 

BUT - I still wanted a miter gauge. I started to look for one, but they run $145+ used on eBay! No way! Here's a pic of the PB-547. It's about 1" tall by 3" wide. 

So what's a person to do? Make you're own of course. I made it out of some scrap I had around. The fence part was done on my CNC and I used Fusion 360 for the CAD/CAM. Took about a day to get it done. Here's my version, I think it turned out OK and I know I'll use it.

Here's a bit of detail

I was in the process of reassembling my long disassembled '75 Norton 850 and found that one of the rocker spindles was a sliding fit in the ol' RH4 head.  Another one was almost as loose. They're supposed to be more of an interference fit to the point you need to heat the head to get them installed. Among the host of issues that loose spindles can cause is allowing the spindle to rotate (it's supposed to be held in position by an absolutely poorly designed stop plate) and will allow a lot more oil to enter the rocker cavity. This, in turn, swamps the valve guides allowing oil to get sucked in and burned which results in massive amounts of smoke and plug fouling. 

One of the better fixes is sold by RGM in England (https://www.rgmnorton.co.uk/buy/one-piece-rocker-spindle-locating-plate_4062.htm). It solves two problems actually, it'll keep the spindle from rotating, and it allows you to really lock it in place with the grub screw which should help keep it much more stable over the long run. 

Since I am impatient, had some stainless bar and a CNC mill, I decided to whip up my own version of these. I think they came out pretty good.  ​

And here's the final result. I think they're going to work very well.