A couple of years ago I was playing a Tyros and arrived at a Nursing Home 75 miles from home. Sure enough, couldn't find the power card. I made a quick trip to a Radio Shack and got one.
Afterwards I DID find the original, in the case excactly where it was supposed to be. Don't know how I overlooked it but, I always kept an extra in the car after that.
Just last year, I went to play a NH about 40 miles away and found I had forgotten the AC adaptor for the S900. I DIDN'T have a spare for it, but guess what-I do now.
We did the entire show from the laptop, using midi files. It worked great, but I STILL don't like to use midi files. They are there only for such an emergency!
DonM