Glad you caught it and don't feel like an "idiot" at all...It has happened to many! Me included!! I personally wouldn't trim anything from the top, just re-train them as needed...You'll be ok, you just lost a little time is all.
This is a great idea...If you can post a link to what you're using I'd appreciate it, as would others I'm sure!!
I just got saved by a wireless water monitor I have Christmas morning....we had flooding issues in this area and i got woke up at 3:30am to water entry in my basement, and was able to divert a big mess. This was also about $50 and a gift from my buddy just a month ago...it already saved my ass!!