Already listed all the endings in this post: https://nifflas.lp1.nl/index.php?topic=7457.msg77089#msg77089

Oh whoops! I completely missed that haha. I'd never have thought to try #3 so thanks for that.

I would strongly discourage even trying to get the last one (though I can explain how to get it if you're really up for it)

It's fine... I'm usually up for a challenge, but extreme precision (e.g. Gaseous Soap) is not for me, so if it's anything close to that I'd best stay away

And yes, you did overlook one of the symbols. It's their order that's a secret and has to be brute-forced. I'm surprised you managed to pull it off while also not knowing one of the symbols.

Hah, well I figured out there's only 6 possible orders, and when you're missing 1 symbol it doesn't take too long to cycle through all of them before moving onto the next order. At some point I even wondered if that might be an intentional part of the puzzle, oops

The key locations are all similar to those in the original Machine. I don't think they're really meant to be among the level's bigger secrets.

Oh, that's good to know! I don't remember the key locations from the original level either tbh x)