Looks like they'll go another route.
Pimax 8K VR
5 minutes ago
Q: If we want to add additional accessories to our pledge i.e. 10m
cable, hand tracking, etc. and we have already successfully paid for our
pledge do we pay whatever amount listed at https://imgur.com/a/FfeSO (or $100 for hand tracking) to https://www.pimaxvr.com/en/product/kickstarter-payments/ and you will sort out the information based on our shipping address?
A: The link on the website is only for those who have failed to pay
on Kickstarter. We will make pre-order campaign available for you to buy