Re: Harvesting all the honey out've a topbar and feeding syrup? I may have a problem
As I see the situation, the Lang beekeepers need to harvest before crystallization otherwise the honey will not come out of their combs when in the extractor. But since you are using crush and strain, crystallization is not a serious problem for you. So don't harvest honey the first year, and let the bees eat what they need over winter. Bees can eat crystallized honey. Here's more on that:
Given your location, I would try to figure out, before you might actually need it, how you could feed your TBH bees, if needed.
. . . . . . "Reality trumps ideology." - - [Crofter - 2017]