The RCM in my 2007 Coupe failed & I was lucky because the "no start" condition occurred while it was parked in my driveway. I too purchased a new RCM from Standard Motor Products and swapped out the defective RCM once the new RCM arrived. Now the best part comes afterwards! I took the old RCM and shipped it to tighed1. He definitely has the most experience and is well skilled at not only restoring the RCM but improving its performance. Here is what he does to the RCMs that are sent to him for repair:

"I'll inspect, bench test, redo bad solder joints, perform the Me So Horny mod (horn works w/o key) and replace the Air Pump, Fuel, Engine and Traction Control relays.
I will then test your RCM in one of my cars before mailing it back to you via USPS Priority Mail (2-3 days).
In most cases, I get the RCM back in the mail the day I receive it so you're looking at about a week total. If you want the package insured please include an additional $5."

His cost for all this is extremely fair and quite a few of us send our defective RCMs to him for repair. If your soldering skills are the little bit questionable, sending your defective RCM to him is a very wise decision! Just send him a private message reqesting his support & he will respond. My $0.02.

Once you get the repaired RCM back from tighed1, you can decide to install it right away or wait until you need to install it. Considering all tighed1 does to repair the defective RCM, it might be better to keep the Standard Motor Products RCM as your spare. Again - My $0.02

Here's a link to his post on the RCM repair: RCM Repair