Yup, gave it a quick test tonight. Was simply a case of installing the VDOpenXR runtime and not starting SteamVR at all. Worked flawlessly. I’m running SSW in the Pico4 so was locked to 45fps as usual in sim but will turn that off next time round and see if there was any uptick in performance. Without SSW I was seeing an average of ~56fps using SteamVR so will be able to tell pretty quickly.
I’ve still to play around with FFR but may give that a whirl as well since extreme edges are not clear anyway so wouldn’t be losing any image quality but may be able to gain some performance.