I have the 'old style' 85C triggers on my Shadows, and the single action break point is in the picture. I like this trigger model as well as the original thicker triggers on Sigs is that the single-action break isn't so far back against the 'rear wall', like with the stock black recurved triggers on SP01's or like on a Beretta.
I tried this same trigger model on a Shadow 2 and although it helped a bit, I found the the trigger break point on the model is still farther back. One of the reasons why I sold the Shadow 2 and have stock with the Shadow 1.
There's also the straight DA/SA trigger from CZ Custom.....
https://czfirearms.us/index.php?topic=108492.0DA POSITION
SA POSITION
(is it okay if I post here, Earl?)