Finally got it.
No problems with the hardware, just won't spot steam vr in the linking app. Everything is connected and working, it seems there's a problem with the path pointing toward the install. Reddit tells me to make sure it's installed under programmes x86, doesn't seem to work.
*edit
All working now, seemingly required a cold reboot. Audio seems weird after using off ear index/g2 for 3 years, but that aside nothing else, there's no differential to using the g2. happy buy i think so far.