Totally out of curiosity, what do the bees do with the wax capping off the flow frames after we’ve harvested.
I will try to remember to take a photo tonight through the observation window. Looking at the flow frames the day after I harvested and yesterday a good solid week and a half after harvesting and the flow frames now look totally brand-new, no wax extension or capping’s anywhere. Totally totally surprised.
Let them drop through the SBB, or chuck 'em out of the front door! 
I will look, I don’t remember seeing any under or around the hive.
put your slider in and then check what’s on it.
Here is the flow frame 2 weeks after harvest. Totally clean, as if their new again 
Here it is right after harvest maybe a couple of hours 
Hmmm…raises a question…On my screen board tray there are what appear to be beeswax drops …not much bigger than a pin head…what would that be? They are uniform in shape and size…
Sounds like fresh unused wax flakes/scales - just fell off a bee’s tummy. 
There are some photos in this article, if it helps to see what I mean:
Oh wow…that’s interesting!
last time we harvested- we watched as the bees started furiously uncapping the cells- even whilst the honey was flowing out. We have a few tiny gaps between the frames at the back- and the bees were pushing little flakes of wax out through the gaps. Other flakes were falling down into the hive- and bees were carrying bits away.
We removed the frames after we drained them- we put them out beside the hive over the next few days and the bees cleaned out the honey dregs- and uncapped more cells. But after a few days there was still quite a bit of wax cappings left- and we have stored the frames over winter- they look very messy. Very interesting to see just how thoroughly the bees cleaned up your frames - but only the cappings- so the cells are perfect and ready for immediate refilling?
It seems as if flow frames would offer an advantage to the bees in not needing to produce as much wax between harvests- and being able to recycle the cappings too? It takes a lot of honey to make wax. It seems you can harvest honey with virtually no loss of wax to the hive- I don’t think there is any other harvest method that does this?
I have not read this but I remember my mentor telling me for every 1 pound of wax the bees have to create they could have created 8 pounds of honey. So yes, this would seem to be a major benefit