Heard that dumping gunto mounts was the norm as you stated. Nice examples, Ed. I have only owned a single sword from Akihide or his students, an Akihisa that was in very rough shape, although the mounts were very nice. Looking back, I wish I would have hung on to that one and restored it. Like Stephen, I'm on the hunt for Takahashi Yoshimune & his students at the moment after picking up a couple by Hiromasa.
In regards to the Easter egg sword in my prior post, here's a hint... look at the habaki in the 4th picture. Someone made a very generous offer of $200 (yes, two-hundred) for it recently though it's not for sale.