you can override the IPD easily in SteamVR though!
You can do this with fpsVr with the GUI, or, you can edit the config file:
C:\Program Files (x86)\Steam\config\steamvr.vrconfig
"steamvr" : {
"ipdOffset" : 0.002,
This tells SteamVR to add 2mm to the actual IPD value! (the equivalent of the ‘Bias’ value in my request here: [FEATURE REQUEST] Cockpit Size and World Scale in VR )