People who run standard flow hives face a bit of an issue when they want to cycle out an old or bad comb. You can’t (easily) put it up in the flow super to hatch out as you would with a standard hive. There are vaious options- putting it on it’s side in the roof, taking out a flow frame temporarily and putting it there- getting another temporary box to go above the flow super, etc.
I have been wondering if maybe- you could use a vertical queen excluder in the main brood box? In the 8 frame boxes there is enough room to fit a thin QX in- perhaps you could put in the vertical QX at one side of the hive- move the frame/s to be removed to the other side of it- leave for three weeks before removing the comb/s and the excluder and replacing with fresh combs?
problem is it’s quite hard to find vertical QX’s… easy enough to make but one made specially to fit the flow box would be nice. It has to be about an inch deeper than the box to sit down to the mesh floor- which now that I think about it is on an angle with a larger gap at the front than the rear… so it would require a bit of finagling.