Let the DP vise "float" or lock it down?

[Charles scozzari]

Broke one of my annular cutters by not locking down the work due to just a little extra chatter. Unless it is a small bit it gets secured.

Before I got a MAG drill I built a 20 ton press and hand drilled all of the 1" height holes with my drill like the above gear reduction unit

Couple times thought I darn near broke my wrist.

This is what was used when drilling machine beams.