That's a good guess! I really don't know, as I have never attempted a one rep max on anything but a bench press (and that was 7 years ago!) Where I did 115.
Will be fun to find out! I'll for sure need to practice movements just as much as training for strength. And of course think about safety first.
I know you used to work for ESA, or perhaps you still work. Anyway, there is a Norwegian company called Orbital Machines that are going to make electric turbopumps for launch vehicles. I participated in the first round in 2018, even though I have no knowledge of the space industry. Perhaps something you could be interested in (https://folkeinvest.no/kampanje/orbital-machines-as-2)? I would of course be interested in any negative sentiments you might have concerning the concept.