1- rev counter goes up to 2000rpm after ignition offSo does mine - a DeLorean Quirk. A lot of cars do it, esp early ones.
Guage sender and pressure switch not the same thing. Sender is the thingy behind the oil filter
2- new oil pressure switch fitted, dances all over the place still.
On their way.
P.S Martin - did you manage to order the coolant hoses I need.... Thanks