forgot to comment on the forearm cut issue...You may notice from the side photos of the 1606E and 1406E, that forearm cuts were cut, sanded and stained into both basses because I could not stand the sharp corner under my right forearm. I would wake up the morning after every gig with a bruised forearm. I actually called Ibanez about this issue. It's such an obvious problem. The forearm cuts turned out great through, thanks to my tech guy.
I also own the BTB7E but it is not pictured.
Did you sand it also on the BTB7? Would be grateful if you could post a close-up picture of it.