Ok, car in the air, time for the fun.

First question. I see mention that I *should* replace the flex discs for the driveshaft, and I see some people saying I *need* to. Are they really one time use?

__________________
1996 ZJ Green Laredo V8, 2.5" OME and Bilsteins, 33's, Holes drilled in the roof.
1998 ZJ Platinum Limited 5.9, Backyard Parts Fodder
1987 Mercedes-Benz 300D Turbo, The diesel daily, 30mpg in style.