I’d get rid of that plastic oil line for the pressure gauge.
Yes, that was supposed to be temporary but here we are a few years later...
If you do change it out, let me know if you notice any difference in gauge operation
(as I have always noticed a difference and it freaks me out).
Put a -4 line to your gauge, and watch the response !
Quicker than copper hard line/response more like plastic?
If it is, I'll order one for sure.
And can anyone tell us why the line material would matter (it sure seems to, but I'm not bright enough to figure out why).