I didn't even know you could just change file extensions in revision manager, that's an interesting solution.
Why did you even worry about making a .psm template into a .par file in the beginning?
I'll do some experimenting, this might be something worthy of a Super Kudos!
This has really worked out pretty slick, on my machine. We use the cut length macro, and create our flat pattern dxf at the same time. This macro doesn't seem to work with .par files, so being able to use .psm files has really helped.
But, something odd is going on with another user. They are using my same -import.par for their template, but when they open the .psm files to transform the body to sheet metal, it is doing so in synchronous. My system isn't doing this, and I'm trying to finger out why. I've looked at settings, we all use ordered, and I can't find the reason for this other user's system trying to work in synchronous. Where I have a transform button that says Thin Part to Sheet Metal, the other user's button says Thin Part to Synchronous Sheet Metal (under Tools, Transform)
Just a guess but maybe check the Options shown below:
? It's the same template that I created, thus why it makes no sense................
The .psm file even is showing in ordered when opened, but the transform is saying synchronous to sheet metal.
Could you record a video about your workflow? It would be useful for us to helping you!