In addition to probably 6 previously done by Tom.
One SKS-M version
One for a Paratrooper
One for a Sino-Soviet
Naturally, they are smooth . . . my goodness, those original triggers were like nails on a chalk board.
I have yet to assemble the rifle and test them out, but they are certainly vastly improved. For any SKS, I add Tech Sights, a cheap rubber buffer and the best money spent to improve the weapon is this trigger job.
I don't have the patience to do trigger, so I'm overjoyed Tom does!