It’s never a good sign when a job is done and you see this on the spoil board. I’ve checked everywhere and have no idea where it came from. Any suggestions or educated guesses? I have the Shapeoko Pro XL
UPDATE:
I found where the bolt was missing. Here’s a picture:
Measure with calipers?
Then check the assembly instructions for reference to that size/style hardware?
Thanks Will. I actually tried that. It’s an M6-12. Naturally that’s the most common. I’ve checked all noted places and don’t see anything missing. I’m starting to lean toward it being something I may have dropped on the spoil board. I will keep looking though.
Do you have a Sweepy dust boot? If so, check the bolts on the cam lock.
Yes I do and will check will. Thanks.
The Sweepy bolts are M4 SHCSs ~25mm in length.
I had a picture just like that 
I figured out that it was the screw that I was used for the ground wire for the bitrunner. (which wasn’t needed after I had switched to the VFD, I guess I hadn’t screwed it in very tight)
John
