I stand corrected. Your post: Discussion of October 2017 update - #84 by dan , stated
“We have all required certifications for the US, but no other country.”
ie you have / had not completed any international certification, and therefore all international ship dates depend on the individual certification processes for each destination country.
This in itself is a massive job, and does not increase confidence.
Again, I suggest to offer crowdfunding pre-orders the option to cancel and buy later at the original price. If (as I believe you’ve said elsewhere) the money is held in a safe account earning just 1%, why not give it back?
This would be a decisive commitment to your crowd, preserve good will and possibly even retain / recover more buyers over the long term - I would still be a likely buyer if I could reach a position of certainty on delivery and support.
And in the end, it’s a decent thing to do.