How about this one...
Tech goes out and installs a new system, 3 days later, they replaced the roof and tech gets popped with a sin7 and the obligatory backcharge because of it.
an upgrade, like an ODU relocate is not punitive to the prior techs numbers.
That is very rare. If a tech says, "I'd like to put the dish on your roof", the customer almost always replies, "Well I'm getting a new roof put on in three days".
Then it's on the tech.