Solved them. The last one was pretty insane. I found most of them very technical and it takes a lot of pausing to execute.
I once tried to make a level that was tight too while execution doesn't need excessive pausing, so it's more about the strategy you take, but I still found execution a bit too annoying so I turned it into a different level, the Ob3lisk (title shamelessly stolen from a Cheapo level by Insane Steve, hope you're ok with it Steve). I attached the initial version of it anyway.
Mod Edit: Restored attachments.