I had to open the guitar a few days ago in hunt of a buzz at certain frequencies (which I may or may not have fixed) so I had to reposition the saddle and an occasion to try a makeshift "jack" which I already carried around in my case:
This kind of tool can come in handy anyway and I can appreciate the play on words
Anyway, the plastic part is a bit longer than the total string width at the bridge and has the right thickness and smoothness to slide up between strings and coverplate and take enough tension off the biscuit, move the cone (carefully) and then slide back the tool slowly.
So thanks at GerryM for giving me the idea!
Gretsch G9240 "Alligator" wood-body resonator converted to non-metal strings (China, 2018?)
Bolink baroque violin (Hilversum, 1982)
Formerly: Brian Cohen baroque violin (London, 1985), Nadegini modern violin (Paris, 1924)