Ive been looking and the longer piston latch route it seems to be the way to go agreed, but the pistons are cheap so I thought stick a nose on it and...
Oh yeah I never thought about the oil, I'll just do the Clamp as is then and pray it doesn't move.
BSA I shall have a Ponder on as she's the current...
The Bisley sling swivels will indeed be fine. I’ll check my Falcon barrel diameters, but assuming your ~15mm is correct, you’ll want the 14.5mm size...