When I bought my Clark SCAM 12, it had no legs, so I’ve fabricated some plates to  clip to the pins and attach using a single bolt, and welded those to square tube legs with telescopic sections ending in 100mm square plates with holes for 12mm steel spikes.  Urgent job for VHF National Field Day!  Hope to have time to degrease and clean up and paint them before the contest, but there are other pressing matters like fettling the 70MHz transverter and fixing the noisy fan in my 2m PA, so it might just get a wipe with an oily rag.