You need to be sure it is at or close enough to terminal gravity to avoid bottle bombs.
Cold crashing won't do anything.The LAB will continue souring and brett will continue fermenting. At four months the beer is probably not close to reaching its terminal gravity.
If you like where the beer is right now your best course of action is to bottle, carbonate for a couple weeks at room temperature and then store them cold to be consumed immediately.
They way it will probably go down is like this: bottle the beer in the month of April. Let beers sit for 6-8 weeks and sample one. Let beers sit.
I have some sours/brett I made a year ago, the dregs are in this newer beer, with 3711. I’m in personal uncharted territory.
Thank you for the feed back. I guess bottle bombs aren’t really a concern for me.
I might store them warm. See. I fermented at 80* and brought it up to 85* over a month.
I am wondering about 5e amount of priming sugar to use though.