If you trim the tip after mushrooming it gets much harder.
If it gets burnished, yes it mushrooms again, but the feel of the hit won't change for you.
Taper a new unpressed Elkmaster like suggested above, and it'll just play out to be flush with the ferrule eventually.
You'll only need to maintain it with a scuffer or pick.
I have different tips on my cue's just for variety.
Lately, there's been more desire to play with the
kamui clear soft; and an Elkmaster (no milk)- lightly pressed in a quick clamp, and istalled with a fiber pad underneath.
Blindfolded, I bet you couldn't feel the difference if installed on the same shaft. That being said...
After several months of play, I've never miscued with the Kamui. They are expensive though.
I know you said you don't like glue-
but that's the purpose of soaking the Elkmaster in milk.
It turns the whole tip into a solid piece of natural adhesive impregnated leather.
Check out the contact point from the milk dud on the cue ball.
You'll see a ghost spot on the ball that doesn't wipe off as easily as a different tip.
Milk duds really do "grab" the cue ball nice for a reason.
There's a guy at the place I shoot who always busts my chops about dirtying the balls up with my milk dud.
Starts blaming rolls on the "glue spots."
Hahaha!