Many thanks!
Interesting that Jessem does not create a revenue stream out of it by making and selling the zero-clearance blocks as consumables.
It certainly looks cooler than putting a piece of wood over the front of a beautifully fence! If you regularly cut tall pieces of wood it is probably worth making the block a little taller so the blade doesn't cut nearly all the way through weakening it.
I'd probably just use a block of wood in future but didn't have anything around thick enough and ready to mill so used the plastic off-cut from another project. You could probably make it with a saw and chisel. The only critical bit is making the front face align perfectly with the fence which is maybe why they don't make them and a sacrificial fence is the easier option.
