[McLaren720s]

My local shop just unlocked my ECU today. They did not removed it. It took about 30 minutes to reach inside and disconnect the harness, then connect their equipment and unlock it then reconnect everything.
It's a tight space to work in but if you remove a couple of the components first it might be easier. This was their first time doing it so it took them a while to figure out how to approach it.

Going back tomorrow to get the tune flashed on! Of course, I could just flash BM3 myself but they're getting a bit more power out of it because they're dyno tuning it as well so I'll also be getting before-and-after dyno numbers along with custom tuning.