Re: Why no tsuba?
I thought the debate was about what Graham himself can (or can't) do. We all have teachers who can do things that we personally can't: that's why we are their students.
On the issue of tsuba specifically, we can all trace our lineage to a teacher who was so untouchable that he didn't need one. But none of us are O Sensei.
There are two ways to accommodate that reality: back off the intensity of weapons work, or take advantage of the added protection a tsuba offers. Which approach you choose is going to depend on your training philosophy generally, and what you hope to learn from weapons.