That's not a problem I'd ever encounter! I'm using 120 film and will never make the leap to LF. Besides, my $12 eScam changing bag works fine for the foreseeable future. I'm not in the market for too much these days (aside from needing to pick up some b&w film for photographing a friends newborn).
All the same, I book marked the link to that changing "cube" and maybe it can go on my Christmas list.
I have had both and sold the cube, kept the Harrison. The cube is such a PITA to set up & take down. If you can leave is set up, not so bad, except takes up a lot of room and collects dust. I purchased a like new Harrison for about a $100 but it does take time to find a deal like that. It is very easy & quick to set up & take down. YMMV