Finally found the culprit of my erratic temp gauge problem (was a matter of just having time to spend on the car) - water gauge receiver. Can only read 1 resistance the other 2 are dead.
I just need the water gauge but if the entire cluster is going for cheaps I'll buy the whole thing and swap them over to keep my original kms
Thanks

Got one, not sure how good it is - might have the same temp gauge problem.  
I'll check, then PM you.

Thanks mate. While it's out, can you do a small check for me? I'm not sure if it's meant to do this but when I flip the cluster upside down the temp needle gradually gravitates down towards the ground. The other needles are still. Just an obvious observation, not sure if it means anything...