I’d be keen to see if it can work, so I appreciate you taking a look.
Electronics are not my strength (yet), but when I was investigating this for the St Vincent, I couldn’t figure out how to make it work. That one was HSH. I would have been happy to only toggle between the HH, then just use a push/pull to cut out the HH and cut on the S. Seemed like no dice, but I learnt a bit more about switches.