Dear Hive Mind.

I'm trying to get my head around the ECU situation on the M3W as I can't find a comprehensive summary anywhere.
Here are my assumptions - can you correct me if any of these statements are wrong and help with my questions.
Please feel free to treat me as an idiot - the ECU seems to be a 'black art' that I'd like to understand.

Morgan have used the same S&S ECU for all 10 years of production P/N 55-0732.
Earlier ECU's used USB Mini B type, later ones use USB-C.
Morgan lock the ECU when programmed and there is no way to unlock a locked ECU.
The software on the ECU is loaded via a 'box file' (mapping).
The Box File for Euro 3 and Euro 4 M3W's are different.
Euro 4 M3W's modified to Euro 3 look are fitted with Euro 3 mapping.
Stage 1 upgrades (exhaust & air filter) will run on a standard locked ECU.
Stage 2 upgrades (exhaust, air filter and 569 cams) require an unlocked ECU and appropriate box file, ideally adjusted on a dyno

S&S Unlocked ECU's are unavailable (possibly long term).
G56 have the Emerald alternative programmable ECU mapped for stage 2 upgrades.
Krazy Horse say they 're-flash' the ECU but how do they re-flash a locked ECU?

Questions -
Is there base software on the ECU that you upload the box file to?
Is that software available on the S&S website?
Is the base software different for Euro 3 and Euro 4 cars or is it the same?

Are there any other alternatives to an (unavailable) S&S unlocked ECU other than Garage 56?


Omne trium perfectum