Springs are also goodFirst time ever for this hobbyist. I was side milling a fairly small part held in the vice on two parallels. I taped the part down onto the parallels while tightening the vise. The part being milled was outside the vise jaws. Long story short one parallel managed to slip forward and crash the end mill. Parallel survived, milling cutter not so much.
I took a piece of shipping steel banding and bent it into a U to hold the parallels tight against the jaws and also made sure the part was seated firmly on both parallels.
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