small block of wood
small round headed wood screw
screw the screw into the block of wood
set the block on a firm/hard surface
place the butt of the pistol down so that the spring cup is on the round headed screw
push down on the screw
push the pin out with a small punch
reverse that the last 3 steps to get the spring, spring cup and pin back in palce
it's also easier to do this with the hammer down against the frame to take as much tension off the spring as possible
I've got my little screw in the door frame of the garage door, another guy here has his on the surface of his work bench, do whatever works for you
shoot, I've used a screw driver with a torx bit in it, placed the top of the screwdriver handle on my breast bone, put the spring cup on the torx bit and then pushed against my chest to relieve the pressure on the pin while pushing the pin out with a punch (do that more than a couple time in one sitting and it'll put on a bruise on me - darn blood thinners anyway).
Good luck, sounds like you mostly enjoy working on your pistols, so do a lot of us.