It took me about 20 hours total (two good days on the weekend), but only because I did everything twice. First time was setting it all up outside the box. That allowed me to test everything before ripping out the original electronics.
Everything is working even better than I expected.
After a year of fighting the Moshi software and electronics (purchased elsewhere) 
, I distrusted Chinese products and software. Now, I wish I had made the jump much earlier.I am working on a document that will help anyone else get started with this upgrade. The supplied documentation is mostly correct, but not well organized for installation and configuration. I hope to have my "Setup Guide" done in a few more days. When I do, I will post it here for everyone else to see/use, as they wish.
In the mean time, I would be happy to field any questions from prospective (or new) purchasers. Just send me a personal message, or get a hold of Marco at Light Object to get my email. I believe I have a pretty good grasp of how to make it all come together.
BTW - I am NOT associated with Light Object in any way other than being an extremely happy customer. I have made other purchases here for about a year, and Marco has always been a joy to work with. I am happy to help out, just because we (the community) need a good US-based company that we can trust.
tim
Edit Note - I have now uploaded the first run at the setup guide I promised. Hopefully, you will find it useful.