The Fatshark HDO Series allowed custom lenses, and with xitsz‘s awesome 3D lens adapter, it’s possible to insert them into the Walksnail Avatar headset as well!
The Thingiverse 3D-printed adapter is super easy to print (print two) and fit (double-sided tape), and then you can use your Rho-lens or CustomFPX lenses when the default +2 to-6 diopter doesn’t work out. A big shout-out to xitsz!
Depending on your face, you may or may not need a larger foam pad inset to avoid your eyelashes touching the lenses.