I had a 1.6L Miata with a Greddy turbo but will ALL the electronics from Flyin Miata(Link ECU, MAT, MAP sensor, Keypad)

I know what you guys mean about "take your time" to hook up all your connections. My car was running 12 PSI at all times and I never had an issue with the car breaking down. Not only did I solder every single ballast resistor + connectors but I also cramped them while adding anti-static and moisture resistant covers. Overall this turbo install took me about 120 man hours
The way I see it is: "reliability of your car is directly proportional to the level of detail"
I see the XEDE no different from the Link ECU, except that it is a step between a FULL programmable ECU and a piggyback ECU.
I also waited and waited for the COBB to "crack" the RX8 ECU but once my RX8 got totalled, I decided to get me the MS3 and I am so happy to see these tuners working in the MS3.
I might stop at BEGI one of these days and see how this "P&P" can be achieved.
Carlos
ps: My first post on this forum but been with Mazdas for quite some time