Update on my spinning disc issue:
History : unboxed , played a couple of games with no problem ; accidentally loaded pro code update , game didn't work properly(of course) ; loaded LE update . game worked again but spinning disc didn't work (for spins) ; fiddled with the mech and reseated cables , got it working again and played until nighttime;
Woke up this morning , turned it on , SD (spin disc) didn't work again.
Emailed Stern , got a reply in about an hour and a half asking about the status of the LED's on the magnetic sensor below the SD shaft.
Answered that within three minutes (lights blinking twice). Lights will blink 3 times when it is working(or recognized) . only checked that once.
Got impatient and burned a brand new code onto a new SD card , to rule out any mix up in the code loading that i did with the pro code.
Put in new SD card and the spinning disc now worked. Put in the old card again . That worked too . Turned off the game and turned back on. now the disc didn't work.
Turned the game on and off a bunch of times swapping in both cards and found that :
50% of boot ups will recognize the disc as working.
The way my game is now upon powering on ; it will either have a working spinning disc or not . If it is working , i can play as many games as i want and the spinning disc will not fail . It's only upon the initial boot up that it seems that the magnetic sensor is failing or some test of the mech is failing. There are no software indications that it did not detect the magnetic sensor as working or a software compensation for a broken disc.
I passed that information along to Stern , although i never heard back from them when it seemed like they were going to help me . Maybe they kicked it up to another engineer or are waiting for a response from another team member.