I think that's me done with Chapter 1 for the time being. Lost ~1 second to slow inputs at the start, and around the same from walking into 5-A early. Also had to improvise Infirmary route since the temp save put the Spoop in a bad position for me.

All in all, I think this is the best route and I'll probably stick with it if I come back to Chapter 1. I'd say 23:50 is a reasonable goal to aim for, so I might come back to it once I've gone through a few more chapters.