MID conversion done at last 
I finally found a couple of half days over the past two weeks to complete the MID conversion I've been planning for months..........
I haven't connected the coolant or washer sensors as yet but plan to soon, and I'll never fit the oil level sensor. The only issue thus far is the 'brake pad' warning I'm getting despite their fitment (I'll investigate this soon) and the Unit Code that'll need to be Tech 2'd.
First of all I had to remove the heater/blower to get access to the bulkhead connector X2. Even though I haven't connected the coolant or washer sensors I want to pre-install the wiring for future use.
I used a donor bulkhead connector (X2) to supply the extra pins required for fitment. I had previously checked that the cruise control wiring was connected to the bulkhead connector (X2) from the ECU plug and hoped that the necessary wiring would be in place for the MID. The pic below shows the added connector pins (Yellow - MID and Red - Cruise Control).
The ECU fuel injector signal, coolant level, washer level and brake wear indicator wiring extended for the MID.
The instrument panel connections (Tacho, Fuel Gauge and Coolant Temperature) needed to be connector, so I removed the instrument panel. Next up was the connection to the brake switch 12v for the brake light check on MID start-up. Lastly, I needed to earth the two sensors (coolant and washer level) to be connected soon, the oil sensor that is never going to be connected, and the lamp check control (not to be connected either). The result was:
Last up was the code check. Unfortunately, and not unexpectidly, the code was 025 which is for a Z20LET - I'll need Tech 2-ing to set it to 003 (Z16XE 205/50/R16)
Cruise Control X2 completion
I've been more than happy with my Cruise Control ever since I installed it last year, except one thing - the wiring through the bulkhead to the ECU. Whilst I had the bulkhead connector (X2) dis-assembled for the MID pin insertions and done the Cruise Control pins too.
In the pic below you can see where the retrofitted loom went through the engine compartment firewall (now redundant), and the new connection to the donor pin loom going to the bulkhead connector (X2).
There is still more to come...................