Dave, I wish you well with your venture however I am not sure this has been thought through properly. Linde moved to hydrostatics a few years back and the response has been mixed - likewise the Liebherr machine has also struggled against TQ equivalents. The sector you are entering expects a supply upto 45 tonnes so you must be able to supply equivalent drive systems upto this mark. Customers will not wish to mix TQs and hydrostatic drives with drivers able to jump from one to the other. Also, I am not sure the hydrostatic braking effect is good for ECH handling at height - drivers prefer the run-out of a TQ.