If you're good in German then you get the information from there, but it would be hard for me to update the thread in both Forums (UK + GER) after every modification.
But you don't really need to be German, because there are enough pics and vids which talk for themselves.

I will post there everything I will do on my IS200.

Here the LINK to my PROJECT

If you don't understand something and you have questions, because of the German language, don't hesitate and ask in the German Forum or here or PM me simply.

I'm always here to answer any open questions.

looking good !

what are the two sensors you have put in ?

The first is an EGT sensor (exhaust gas temp) that I know the engine temp.
The second is a wide-band lambda sensor to read the correct air/fuel ratio.
Inside I have gauges for both sensors and the SAFC to set the A/F ratio.