Finally had a chance to get back in the shop and do some work. I needed a bench that was reasonably large that would stay level. Created an assembly bench using a torsion top with a 1" maghonay trim.
To permit leveling, Created a tube in tube leg system that adjusts the top from 25" to 39" high. Since each leg adjusts separately, it allows any unevenness in the floor to be handled. Because of the weight of the iron base, it is pretty stable. The lower shelf is for anything needing to be hanging around while working.