Where I work, we bought several of the platforms and scissor sets that would produce the level change we needed. The hydraulics were provided by a dedicated electric pump and tank system. Everything is enclosed in cagework so you can't get in to the scissor system with the power on. Instead of bolting the scissor system to the top of a carriage and drive unit, we just bolted it to the shop floor.
Craig C. snipped-for-privacy@ev1.net