Received the SKREEM, ECU, and keys back from Josh Chase at themercedesswapshop, and it all works great! What a relief! Thanks for all of the help here!

Was concerned about the possibility of the package of parts getting lost in delivery.
I paid for insured 2 day delivery from Phx to California. It took them an extra 3 days to get it there! Due to COVID there is no guarantee either.

I also put in a fixed RCM from TIGHE and installed a redundant battery cable.