I am up to 6 uses on each brush with no sign of either of them loosening up. I know myself well enough to know that it will not be very long before I lose track of how many uses are on each of these brushes. So this may be it for specific number updates on these ones unless something changes, like the knot falling out, lol.
I have some other knot/handle combos that I want to try and I have actually been considering pulling the knot out of the red handled brush. I really like the knot but it is just a touch floppy and it could stand to be set slightly lower, unfortunately I can not mount it lower in this handle without drilling the handle deeper, which I would rather not do at this time. Also, if I pull it out it may give me a better idea as to how temporary this tape is.