I have a Scorpian, its about two and a half years old, its been modified and has a probe sencer that detects the water level and cuts the pump when water is getting to high, also the switches have been relocated at the top of the machine, i was getting sick of changing the switches as water was dripping onto them! also the internal bores of the vacume inlets and exhausts have been enlarged and now are smooth bores as oposed to the cosenteener type that were origanily fitted, all this has created more airflow