Here's another one:
I like to use the MFs with a template guide on the router instead of using a bearing. Keeps me from messing up and routing the guide.
but that means there is an offset between the edges of the template and the actual cut the bit makes. I have a spacer block for that offset. (actually two times the offset for both sides)
So to set the template, stick a piece of the stock you want to make a space for and the block between the rails, then tighten everything down.
Easy peasy!
Ron