Here's a trick to help get the clutch disk centerd.
Trace around the pressure plate with a pencil and you can use the marks to confirm the disk is centerd, Assuming the same disk is going back in. Not so sure about this one. Manual shows a wear limit of 4.8mm , This one measures 6.3mm.
Looks like the rear main is not the source of my leak.
The trans input seal on the other hand...