About month ago I started working on this project. The goal is to reverse engineer and optimize zx spectrum 48k version of the game. Now my mod is about 2.7 times faster than original and I keep working on it. Also some of the bugs of original game were fixed.
https://spectrumcomputing.co.uk/forums/viewtopic.php?p=136743
https://zxart.ee/eng/software/game/arcade/action/saboteur-2-mod-by-thealfest/
[May 2024 update]
I am too lazy to make new comparison video, but current mod versions are about 6 times faster than the original and have more features and less bugs. The same route takes about 1m10s.
