@MikeN :

"Spare RCM?"
As of last fall, here is my rule number 1:

1A) The car does not leave the garage without a new or rebuilt-by-DJ spare RCM in the trunk.
1B) The car does not leave the garage without a new BOSCH Crank sensor in the trunk.

I have been left stranded by my Crossfires three times: once for a "sticky key lockup" in 2010, once for a CPS in 2013, once for an RCM last fall - NEVER AGAIN!

That brings us to Rule 2:
2) You do not drive a Crossfire, other than home from buying it, without doing the sticky key mod.