Joe / others
I Chromed my rear light reflectors which greatly increased and sharpened the light output and sort of nullified the need for LED's.

But this was very expensive - and tricky - as the paint is highly conductive. The light module has to be fully dismantled using a custom tool and all the paint has scraped away from all the positive conductors.
I have installed a wide LED 3rd brake light which does not reduce any rear vision (like the Porsche one) but does conflict with the rear sun visors - which I am going to have to customize. But then how often do you use the rear sun visors ?
I have replace all the internal 'white' lights with LED ones [ highly recommended and easy to do.]
I have customized the HAVC controls with LED's using fiber optic cable - with varied success.
I have blue LED'ed the the AC button - very proud of that one.

[ I had to use some micro flexible PCB track for that job

]

I have replaced the door open red lights with LED's left over from experiments with the front parking / side lights.
I have purchased, but not yet fitted, the LED's for the Pod ( from JAGER )
I still plan to replace the 10mm single LED's currently fitted to the front parking / side lights with multi-cluster LED's - sometime soon - will post pics here.
Ben