Smart idea. I got a chuckle out of the second picture of a framing square - which is not known for its accuracy - showing the accuracy of the hole pattern created. Yes, I know they can be squared.
It was a Peter Halle YT video where I got the idea for a wooden fence for the right hand side of the guide rail on the MFT. Massive improvement that I would not be without especially for routing dados in cabinets.
I guess I'm just a lucky guy for watching the YouTube video about it...
It doesn't look like much but the many benefits it brings to an MFT are amazing.