There is quite a bit of material on both sides of disco rail that can go away.
Ejector is held into frame so hog out all metal you want. Extractor needs support in a couple key areas. Outside those key spots start making chips.
If you don't want to tri top I would do a "bulls eye" cut in the slide...
It's a deep grove cut on bottom of slide in ejector tunnel that cannot be seen until slide is turned over and inspected...
Honestly most people wouldn't even notice.
Hmmmmmm
You mean people actually clean their own guns....wow
Some of guys I shoot with can't take the slide off their gun....
Keeps the local "smith" busy/happy
Egw is ok
Brown is my current favorite
I hear stan chen has a new one that is supposed to be the "bees knees"...
Any good smith and a "dremel" can get you where you want to be...assuming front strap is also undercut