@howil Did you have a chance to try that firmware?
Based on some feedback, I’ve prepared another build with different tunings. This is only for USB 2.0 for the moment, USB 3.0 likely has room for improvement too but it is a different set of tunings.
I would appreciate any feedback if you are able to give it a try, I added it to the same thread: Librem Mini v1/v2: Feedback request for USB tuning preview build - #2 by jonathon.hall
Just as before there are no permanent changes to the Mini v2, you can revert to the release firmware at any time. Only the blue ports are changed in this build, so try your USB 2.0 devices in those to see if they are improved.