Tweaking the Luger trigger?

[SIGP2101]

Tweaking the Luger trigger?

I have this shooter that is really accurate. Now it has been my project gun ever since I got it. My latest idea is to make this spongy trigger nice and crisp. Preferably two-stage trigger would be ideal but not sure if it is feasible. I have lots experience in trigger jobs but not with Lugers specifically. I did polished this one but that is all I did so far. Feels 50% better but it is not crisp and light yet. Has anyone succeeded in making Luger trigger perform as match gun trigger and are they any instructions and guidelines on how to do it.

Thanks!