Once you get 3-4 feet in, how do you cut out and remove the comb? I was "tippy towing", full arm inserted in the space and holding the very end of the knife and could barely reach the end.
Here is what I have done for years, we have a lot of old double boarded houses here in North West Pa. I have an industrial metal dust pan that is 16 Inches wide. to which I have epoxied a long rake handle, I also have a how that is straight with the blade inline with the handle, rather than having a bend so the blade is perpendicular to the handle when I get in to where I can no longer reach I run the long handled dust pan into where the comb begins. Then take the hoe and cut the comb from the floor. it almost naturally falls forward into the dustpan. (except the last row) Un some instances I will cut 4 inches off each end to take the brood comb intact.