I made this little drill vice recently out of pieces of aircraft spec light alloy from my scraps box. It is based on the principle of the common pistol grip hand guns used for dispensing silicone, etc., ('monkey-up-a-stick' - like the very early VW beetle car jacks), and I did in fact re-use the actuating 'tab' from a scrap silicone gun. I also initially used the spindle but it turned out to be too soft and easily nicked by the tab. This was overcome by using the hardened and ground spindle from an old tailgate support strut which works extremely well. I have since been using it on my drill table and it is proving a success and a joy to use.
I have uploaded a video onto my YouTube channel showing the individual details and workings of this vice which I have included here:-
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