Glad to hear you're having a blast!
I do like fancy focusers myself, though the SolarMax 60s' helical focuser* is not very well liked, mine had some backlash, but it was still usable and the scope served me very well.
It's a shame h-alpha is so expensive! I look forward to seeing what you make of your DS unit! I found it well worth it for the increased contrast on the disc, though perhaps it depends on the user's eyesight how much difference it makes. I used single and double stack over the same period for a good while (we had his and hers - I used the single for imaging plus visual and also observed a lot with my wife's DS) and you do pay a lot for the double stack and I am happy enough with a single stack but would always try to double stack myself when funds allow and if the bug really bites!
I really love the Radians for h-alpha and for white light.
Those Lunt 50's do look neat, I intend to replace my current filter as soon as funds allow and I think it will likely be with a Lunt.
I think you make a good point about returning later in the day to see how things have developed. I didn't know when I started out just how quickly things can change!
re: beer, the amount to consume is if my dodgy maths is right inversely proportional to the cost of the h-a filter. Maybe switch to Coke if you get a double stack 80 down the line?
@Merlin, I have no idea on mechanical things, strap wrench is the best thing I know. That's a horrible situation to be in with such a valuable unit. Hope you get it sorted. It might be worth asking on SolarChat: https://solarchatforum.com
* the helical focuser on my Tele Vue 60 is sweet!