The Cpu tester has been a very useful tool for me to use on this repair and I've certainly learnt alot so far.

One thing I learnt today was that just because all the lamp drivers are working, doesn't mean that all the lamps will work but at least I knew that the remaining problems were somewhere other than the CPU/driver board. 

Anyway I still had 12 lamps out of 64 not working. 
One was just a blown bulb, one needed a new diode on the lamp board and one whole column was also out but came on after I wiggled the CPU connector.
Only two more to get working now. Looks so much better all lit up.

Also replaced a TIP36c on the Auxillary power board today as the knocker coil was disconnected due to being locked on . Now reconnected and working fine.

Still have to tackle the mystery wheel as the opto switch has failed.

Have been enjoying playing a few games but unfortunately just a little while ago, the coilstop on my right flipper self destructed, so I need to order another and repalce that as well.