Not a tool but a way to improve one...
I just got this Hydraulic Crimper off eBay and was having a hard time using it while holding a cable into the lug being crimped. Got to be quite the juggling act.
I figured mounting it to a plate so I could clamp it to the welding bench would make it a bit easier to use...
I modified my crimper so it will easily clamp to the welding bench. Frees up a hand for holding the wire in place.
I marked out a pattern for a couple of drilled and tapped holes in the head.
I will be screwing it to this piece of 1/4" plate with a couple of drilled and counter bored holes.
I clamped the tool in the drill press vise and drilled two holes out to .149 for tapping for a #10-32 screw.
Here is the plate getting drilled and counter bored.