I bought a Wheeltronic and set it up, and discovered it had issues. It is a two post whe a cylinder on each side that meet at a flow equalisation valve. I found out after the fact that the previous owner had never set it up so I don't know the last time it actually worked. When I got it one side would not go down, and the other side would not go up. I got it back down by loosening the safety foot valve which I then cleaned out. The only other part to this thing is the equalization valve, which I pulled apart and found to be quite badly damaged inside. Someone had used a pair of vicegrips to force the adjustment valve into its seat, so leaky leaky. After replacing the valve I now have a hoist that raises and lowers very unevenly. I have bled the crap out of it as per the instructions with no joy. Anyone dealt with this?