Have you moved the car around on those 4" casters yet? Hopefully they will work OK for you. I originally had 4" casters on my body stands but the car was a PITA to move. I redid my stands with 8" casters so the car should move around much nicer.
Yeah those wheels sucked!
I'm getting big fat wider one's before it comes back.
It's been so long since it was on casters, I didn't realize how hard or easy it would be to move around. Took us about 45 minutes to creep it slowly on the trailer on them.