Used the tool now a few times for MTB and Racer and works like a charm. Both hands free and easy maintenance on the bike.
A little bit of a learning curve, but works exactly as intended. Definitely recommend watching the video as it's incredibly helpful.
The SHM-5 pin for my XTR derailleur was a few thousandths too large, but their customer service was very quick to work with me on a solution and get a pin the correct size to me.