The carriage and crosslide locking scresws on my 3in1 machine are allen screws. I usually leave an allen wrench hanging in them so I can tighten them as needed, but most often the wrench vibrates out or I knock it out when reaching for it. Trying to figure a way to keep a wrench tight enough to stay put. Thought about brazing the wrench fast to the screw, but that doesn't leave enough room to swing the wrench. Thought about thumbscrews but would like more leverage. Kinda thought I saw a screw with a locking or spring loaded slot or something along those lines somewhere. Any thoughts?

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