Must admit my first thought on opening the thread was "oh FFS, seriously?".
Then I watched the OP vid (well, the 45 seconds I could stand), and said it out loud. That Casady bass is its single redeeming feature.
So does Horace Panter 😎
Although to be honest, Horace could play a pink Daisy Rock flower and would still look cool. If I ever bought a Thunderbird, it would be solely because of this man demigod.
That's definitely one of the better SC shapes I've seen. Lovely bass.
However... just a thought... the ramp (I'm presuming it's homemade?) is a bit scruffy and lets it down a bit. Maybe consider a coat of paint on the ramp, or taking it off altogether for the pics?
Zombie thread alert! found this earlier, too lovely not to share. Beautifully melodic bass solo too.
I love the look that bass & drums share at 0:04. Says it all.
Are you confident that the neck will withstand the substantial increase in string pull? I saw a comment on (I think) Farcebook the other day from someone who'd converted their 4 to an 8 and ended up with a neck that Robin Hood could have fired arrows from. Something to look out for. Personally if I was to make an 8 (and I've considered it a few times) I'd consider using a narrow-spaced five string as a basis. OLP 5-string 'Ray perhaps?