The 4th one is even sometimes collected in any%, depending on how many missiles the runner wants to have. You want to carry the booster there anyway, it's just a matter of whether you want the missiles or not.

You may have found an answer somewhere - but the answer is a mostly no. If you have a cart that has an earlier version, you can factory reset the switch and use the cart without updating, or you'd have to mod the switch - which is heavily unadvised.

If you're taking suggestions at all: Any chance you can make Teleportals also link to their counterpart somehow?

The other thing about Glitchless is that Glitchless runs still fit into pretty much all of the other versions. It's just harder to tell where your closest contemporaries are. I imagine we'll have a category extensions or something in the future where people can make whatever categories they want.

This one's been being seen by a lot of top runners for sure - I've seen it on Karterfreak, Bdog and ReaderMorgan personally. Karter's had it happen both by laying a power bomb and using beam, but tends to find the Power Bomb is worse. Beyond that... just pray.