I purchase Rhino 40DS .357 October 2020 - using that in IDPA also.
Now February 2021 shooting that 6500 rounds .38 special. Trigger pull is about 6,5 pounds, not doing anything for that yet... but planning open and bending springs, or even made new one a little thinner wire..
I understand you having many Rhinos. Is something you using mostly and how many rounds now gone with that?