Thank you Danny, I had hoped to post earlier but this year proved quite eventful. I'm sure Camlobe and ancient grease-monkeys like myself will know not to fix it if it isn't broke, and that old hydraulic systems are best left alone. The Geriaviator Mk. 1 has an inherent design fault which was bound to restrict the flow. It is many years out of warranty and parts are very hard to come by. Thankfully an expert plumber was on hand, so to speak, even though the unit will be subject to regular inspections
Back shortly!