I needed to hold a new component up to an existing one, to spot through for bolt holes in the new bit. I couldn't get a clamp on, but a tiny jack would do the job, if it was less than 0.75” high. The problem was easily solved with this:
It’s the threaded jaw from a small parallel clamp, with two M6 bolts in it. The only work involved was a facing cut to remove the raised lettering on the bolt heads. Very stable in use.
Not exactly an life-changing* idea, but I thought I’d pass it on in case anyone else needs it.
Andy
* I tried earth-****tering, but look what happened
