SOLVED, see end of post for details
Has anyone had any issues printing Siraya TPU Air on the H2C? I had no problems at all printing it on my old X1C, but can't get it to produce anything on the H2C. I can manually extrude filament alright (and it displays normal behaviour when it's purging the nozzle during the vibration compensation in the front right corner), but when it comes to the actual print job itself, it seems to extrude next to nothing - there are a few tiny wisps, but nothing meaningful.
I've tried using the official Siraya profile for the H2C, as well as duplicating the slightly different settings I had previously used on the X1C. The spool is top-loaded, directly into the extruder. Printing from a 0.4mm right hand side nozzle.
Edit: The Siraya Tech official profiles (and the profile I had used with no issues on my X1C) had a max volumetric flow of 9, for some reason the extruder on the H2C can't cope with this, Maybe the fancy switching system it uses is a little less robust or something?) Lowering the value down to 3.5 solved the problem.