I just completed assembling my Flow Hive today–one super and one brood ordered from Flow. Generally, I agree with the comments here. I definitely had to do some sanding, most notably on the corner dovetails, the observation window inset and the rear window cover (to make it a bit easier to pull off with the knobs). One screw hole was slightly off on the one of the roof pieces, but was not a huge deal. The cedar is very soft, so a fine wood file and coarse sand paper did the trick. As at least one other respondent said, better a bit tight than too loose.
One tip I came up with…when assembling the roof, the instructions say to “lift the back panel so it aligns with the rake of the roof”. I found that 5 of the provided comb guides stacked on top of each other raised the back panel to just the right height. Of course, this option was only available because I skipped past the frame assembly instructions. Would be good to see the instructions possibly modified to make use of this “built in” capability.
Note, I skipped the frame assembly step because I naively thought that the Flow frames would somehow need to get “attached” to the wooden frames in the Flow Hive kit (I haven’t received my Flow frames yet, just the Flow Hive). After looking at the pictures more closely, I believe that the Flow frames are complete, i.e. they require no other assembly into the wooden pieces in the Flow Hive kit. Would love to hear some confirmation from the forum! Which leads me to a follow up question…are the 7 wooden frames in the Flow Hive kit meant for the brood box? Do they need some sort of substrate (purchased separately)?