Not too long ago, I was out to test some things on a friday at the local track. I was mainly using an old difalco external resistor controller. Well, the brake pot wasn't sitting quite right, and when I went to go get a misbehaving car, I smell something burning and there were actual flames (small ones, but still!) inside the controller. One down.
I put on my backup (pretty fine tuned) turbo controller to continue what I was doing, next thing I know, the wire broke at the black clip.
These two things happened within 10 minutes of each other.
So here I was down to a stock turbo that I had on me to test.... so yeah, having a backup is essential. What the backup can do, what the backup consists of... all up to you. But it should be good enough to work with your cars, and you should practice with it from time to time. They all have to work. You never know when your controller or your friend's controller is going to go poof. Plus you might find that different cars work better with one vs another, so your backup for your wing car might be your primary for your retro....
Then again, for some reason or other, I am up to 14 controllers. Of the 14, I think I regularly use 3 or 4. Most of the others are for sale/lend/test/learn.
