A couple of years ago, I did the conversion through your method and it has worked great. I love the watch so much that I decided to buy a used one on Ebay as a backup, in case I lose the one I have. Crazy I know, but the watch does everything for me, from aviaton, sports, etc... and knowing that the D2 will be discontinued, then it makes sense.
I found your old post on how to proceed, so hopefully I can figure it out. The only problem I have, I cannot find the D2 firmware. Do you happen to have it ? Where do I find it ? I assume that I could flash to an old one and then upgrade later.
Thanks for your help.

I've collected all necessary files here:

[Only registered and activated users can see links. ]

There are also _Backdate firmwares in case you're already on a newer firmware than needed for conversion.