Had a quick glance; interesting. Reminds me of the "everything they teach about bows is wrong" video I saw some time ago. I think in the case of the back-scabbard there's less documentary evidence (though I am by no means an expert) and people tend to gravitate to whatever works.
In my case I can't really be trusted with swords. Mine are *very* overdue for some TLC as they're in danger of going rusty but if I pick one up I'll just drop it on my foot.
