Back in 2016 with one of my sciatica episodes......I vividly remember it was Palm Sunday (so April?). As I leant forwards when brushing my teeth....BANG! I was then off to my RFD to collect my new-to-me TX. I was struggling like mad to get to the car / drive / carry the rifle / drive back. That episode lasted for months. A few days into it, a pattern started to emerge where between about 11.00 am and 7.00pm it would clear a good bit. Then killed like mad from the evening. Late August / early September I was working at MotoGP at Silverstone on the Ducati stand. At the end of the Sunday we were busy pushing lots of bikes and loading them onto the trucks. I thought to myself, "you're going to pay for this".......next morning the pain had gone and it stayed away for a good while. How weird was that? Obviously a disc or whatever had got tweaked back by the work and sorted the issue.
Good luck with the spring transplant and project Airsporter.

I have here a Japanese made BSA scope (1970s). Think it's a 4x40 and, obviously non-AO. Let me ponder if I want to let it go or not. Very nice optics and would suit the Airsporter nicely.......