I use the 2018 and they are tight but that is the size I had on hand.
I cut mine to 1" and glue them on with super glue. They work fine and I don't see the need for the taper. Have at it if you want, but like I said I don't see a need for tapering them.
I do disagree with the comment that the footings are are not worth the effort. I shoot about 60#s and my stump per arrow count has gone way up with the footing. Prior to the footing it only took a good oak knot and the arrow was toast. I don't foot my hunting arrows, only the stumpers and target arrows - always.