[nateman_doo]

First time I am ever messing with them. Is is possible to pack too much grease into them? I slipped my grease gun onto the grease fitting and pumped away until it was busting at the seams with grease. Now I feel like its much harder to move.

Also, is parallelism to within 0.005 acceptable operation?
I made a jig and ran a 0.0005 gauge across the other rail.