Howdy, I've been playing Longhorn basses of one kind or another since the mid 80s. Upside-down is not a problem for me. I play with the bass resting against my hip, I suppose if you played it lower the knobs would get in your way. The pointer knobs on the new "Dead-On" version do get turned accidently on ocassion as they are pretty tall, but the other versions with concentric pots have round knobs and they are not a problem, and the JJs don't have stacked pots so are definetely not a problem.
I'm gonna assume you would restring it lefty, most of the Longhorns have the rosewood bridge, and most of those are straight across, so it would be very simple to loosen its screw and rotate it to the proper angle. As for the nut, Dano nuts are aluminum and mount at the end of the fingerboard ala Gibsons, and are mounted with a single countersunk screw. My guess is if you swapped the existing nut around you'd need to drill out the hole a bit so the screw would sit flush. There is a Dano parts site online and last time I visited they stocked lefty bass nuts, so that might be an option.
IF you're thinking swapping the controls over, the two things that come to my mind are: There's a center "block" in the body that you'll need to work around, and access to the control cavity is thru the rear of the bass.
Cool thing is the body is symmetrical and the strap button is mounted at the heel.
Let me know if you have anymore questions, hope this helped, here's my 4 Longhorn basses:
- and the damn thing plays and sounds phenomenal. Crazy!
