Really nice reading material, this thread
Nice that you love this relatively simple and cheap airgun so much, and that you shoot so well with it.
Personally I find that most BSA's have a bit more character to them than the German offerings. Just this nice Englishness, like a Land Rover and a Barbour waxcoat.
Although I've never owned a Supersport, I have just bought a Lightning in .22 for 120 pounds posted. I was happy with that deal.
It's in great condition, but the trigger needed some attention (I swapped the trigger mech from a Spitfire donor/repair gun, and now it's spot on).
Perhaps that's the reason why it's so clean, who knows.
I'm loving it. Not pretty, no, but as written above: a very comfortable stock. Much like the one on Ultra mmc's.
Used to have a Welsh Willy tuned Lightning in a wooden stock - nicer to look at. I regret selling that one. It was lovely.
Cheers and enjoy