the store bought pair I have are pure ****. I wish you lived next door...... I was thinking about a rack&pinion for Adjustment or possiably a cable pully to lift&adjust the hight. mine have the slide with pinch bolt...what a pain in the ass to go up just a tad or down a tad. a crank handle for that would be so sweet to have. keep up the great work!!! I need to make one for my band saw at some point....Ive been using jack stands for it.