I had that issue with the nose area in the first Pimax 4K I bought, but I bought a second one a month ago, and found they had redesigned the nose area (now the same as the Vive) and it's VERY comfortable.
Proof of the better designed nose area:
I show the Pimax 4K and Vive in that vid.
I sold the first Pimax due to the VERY uncomfortable nose area and issues I had with reading text in games, plus the filters made some games too dark.
I'm hoping the issues I still have with the 4K will not exist in the 8K, and I really, really can't wait till tomorrow - PIMAX 8K KICKSTARTER!!!