I made a brass pivot pin several years ago, I haven't used my 1377 too much but it has a flat top piston and pumps up pretty good, sure it's bent like that but it hasn't gone any further and still cams shut... but that was a hind sight thing for me, just haven't replaced it yet Looking good, I polished it up like you did back then too, but it's been sitting in a vehicle or otherwise abused for several years so isn't as pretty anymore...
Nice looking pistola ya got there. Digging the contrasting/complementing colors with he brass/polished frame/ black plastics. John