Granted I didn’t use Easel to cut my inserts out, but I set it up on Easel for your use.
I used an 1/8" upcut bit running at .1 depth per pass 50 in/min feed rate. Tabs on the outer cut only. All others I made “FILL” cuts. This should take about 30 mins. Your fees and speeds will depend on your material.
After its cut out, just sand the tabs flush with the sides. I also had to clean some of the burs that were left. A card scraper worked great here.
To make it fit very snug I added two screws to the end as seen in photo. First I drilled a hole smaller than the screw then one larger than the screw head. If you use a counter sink here you can skip the second drilling. These make it very easy to get a very snug fit. I used stainless steel, but anything would work here. Just make sure they do not protrude further than the sides until you adjust them.
Once I had a tight fit I removed my riving knife to make the blade cut. Then I re-installed the insert, moved over my fence. Then turned on my saw slowly cranking the blade up. The blade slowly rises and cuts its kerf in the insert. If you are not comfortable holding down the plate use a scrap piece of wood. Keep your hands clear of course.