I did everything at once. Upgraded the machine (extruder, cables, etc all but the scanner poles) updated the firmware and using 0.8.0, I accept the default settings the prints are as good as the ones I was getting when the machine was new.
I am using some Polymaker PolyPLusPLA I had one print fail because the filament snapped.
I have had 2 prints of fair quality ( still can't seem to make circles or ovals nicely)
Another print failed due to lack of supports.
The quality is much better than previous. Less noise, no knocking. Clean first layer (raft etc) Sticks well to the magnetic build plate. (Sometimes tough to remove the small bits from the supports.
It is not great but it is much better than me not being able to use it at all because of extreme warping issues leading to 100% print failures.