They’re all questions you only have to ask once. It’s how we get by when we’re not born with a head full of mechanical knowledge.
I just went to the local commercial vehicle service centre and since he can’t fit it in until Monday at the earliest he gave me a step by step run down of exactly how to fix it. He was very friendly, answered a load of questions and told me to give him a ring if I get stuck. He also had a mk2 RS2000 in the yard which he gave me a tour of so I’ve got a new mate.
Oil filter housing with built in heat exchanger and new filter is on order. Oil and coolant flush purchased. Ready to go! Oh and the bumper is off for a reason. It’s a perfect opportunity to fix the dent that someone left me with so it’s been collected by a mate.