Certainly easy enough to shim it whenever or if ever it becomes an issue.
Are you "squeezing" the out of tune notes out of tune ?. I've had this on a guitar with extra skinny strings..
Well it can't hurt to shim the neck, seeing as you can.. If the saddles are right on the floor as it stands you've no future wiggle room to lower them obviously.
My interpretation would be... Live vid, a straight recording of the band playing thru a song..
.. A video shoot would be a film version with lots of shots and angles cut in and edited etc, along to a backing track, not a live recording..
I used to walk around barefoot quite a lot, and even drove a motor likewise but I'd definitely not be playing a gig or rehearsal room without footwear.
I suppose you could take your own nice bit of carpet with you and roll it out to stand on, might be an interesting stage gimmick...
I think the Tokai stuff in the 80s was japanese, I'd think anything after would be Korea then China.
Great looking bass, I've never had a thunderbird type but quite fancy trying one...