Yes it was one of the questions in the survey that was sent out to all of the 8K backers. To quote...
Q) Our estimated shipping date for controllers and base stations start from April, whereas headset being shipping from January 2018. Would you prefer to:
A) Receive the HMD as soon as possible, and the controllers and base stations from April
OK so the April deadline has come and gone, but I should still get my 8K headset first, which is fine for me as I already have a Vive, v1 lighthouses and controllers, then when Pimax release their own controllers and lighthouses they'll ship them to me separately (at which point my brother will inherit the Vive).