This is a slippery slope in that you don't want to "give away the farm".
Trying to help someone by sharing the ideas and methods you've developed to become more efficient is akin to giving away your competetive advantage.
Not that people here or othe places do not want to help, its just a fine line line to tread.
If you're an implementer of SMED than you're probably ahead of the pack as it is.
I would offer these...
Have good (current!) documentation on things that are finicky.
Train the operators and set-up people all the same so that differnet people can do differnet aspects of the change over.
This will allow for people to get pulled away from a setup while someone else can step in and take over.
Have a check list of what's done, as people ebb and flow through the change over, a check list will prevent "back tracking".
These are just a few, but you get the idea.