Thanks, everybody. Bootsy? No way! I played the bass line as fast as I could manage without totally losing it, and saved it to the looper so I didn't have to try playing it 3 min., I'm pretty sure I'd mess it up.

I used both the pickups w/ a Twin preset. I did the rest w/o "cheating", though.
The slide part was in standard tuning. It's in the key of A, sort of a 5th chord thing, so letting the A string ring open holds it together while I used the slide. Lots of gain there helped also.
I'd never used the pedal steel slide on 6 str. electric before. Just sort of cradled it in my hand underneath the neck and slid it. It's heavy enough that no downpressure is needed, just
barely touch it to the strings.
I was thinking of the sound of the drivers hammering faster than they could tolerate on an old steam locomotive (bass), the whistle blowing, train losing control, panic. I guess that sound could space you out coming from a distance, until you figured out what is was,
then you'd be hyper!