I'm in the process of selling my BK4 because of the floppiness factor. I had a fellow member send me some o-rings and if you slipped them over the handle and up to the base of the knot it firmed it up a little but it still wasn't my cup of tea.
I've fallen in love with Simpson and each day I chose one of four I own and know I'm going to get great lather no matter soap or cream, bowl or face lather.