Diy Service V Dealer Service

[GTHOXR8]

I have an AU series 1 and have always had it dealer serviced mainly because of the log book and also was'nt keen to do it myself becuase of the computer diagnostics and complicated stuff like that.

I am thinking of doing all my own servicing now and saving a squid or two
Given the low resale value I don't think it will make much difference having log books.

Does anyone know what actually happens at a dealer service with all the diagnostic stuff. Does it actually fix anything. I used to do all my own timing back in the good old days with a dizzy and points but what happens now with electronic timing? Does it ever need adjusting?
Any other electronics stuff I need to know about if I self service.

Any info, as usual greatly appreciated.