The v5 shown at ces had some changes that came with issues.. First they need to optimise it.
When that is done they should update us on it and start sending a small amount out to some early backers.
People like sweviver and mixedrealitytv.. They should give is great reviews!
If they are positive about the headset i believe that will be it. And the headset is finished, ready for mass production.
If they find issues that need fixed, then maybe pimax will need to fix those first..
So it's hard to say or put dates on that.