Get it here https://www.amazon.co.uk/gp/product/B06XTBZBFN/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
18mm Gasket works perfectly for me - no distortion or warping.
The custom MaxDAS :
Vive DAS, 3D printed adapters and VRCover foam replacement
It is now an awesome headset, out of the box it was trash, i was ready to sell it after the first evening of discomfort and distortion drama.
Good call!. I set my pimax 5k+ up yesterday and that headset is really painful for me. After 30 minutes testing I drew blood. I have a slight kink in my nose so it protrudes a few mill just left on the bridge of my nose (broke it years ago) - so its difficult to fit in the small gap with the IPD set narrow with the foam faceplate pimax supplied. The sharp corner of the lh lens housing behind the fabric actually rubbed then cut into my nose. (still tender now!).
Widening the IPD further is not an option (unless you're Marty Feldman). I can only assume the designers had small noses or wide eyes - lol. Went to work today looking like Rudolph.
I ordered this gasket set from amazon late last night - it arrives Saturday am. Hope I don't lose too much fov by having my face further out from the hmd or I might have to get my file out to make modifications ------ to my nose!
I gotta add, the 5k+ was pretty stunning. It runs ok on my AMD8350+1080ti and I haven't tweaked anything yet. Just set to vr medium in ED, normal fov in pitools and I'm getting between 45-80fps (thats in DW2 exploring and a bit of cqc). I think its far better image than my cv1 and the fov makes it far more immersive. Just gotta nail this face-fitment issue of it will mean cosmetic surgery - for the pimax or me.