Hello ggggr what a jolly good idea. I have 3. Two are of reasonable condition and 1 is a real bitza, Webley Ospray tap etc. so experimenting with this one is OK.
I don't want super power and an unstressed, soft plinker is all that is required.
OK then I will ask chaps, what spring is suggested please?
I may well start with removing a coil or so.
Thank you.
Geoff.