Im calling bs on that mind we tightened, un-tightened, tightened, drove the car, un-tightened,they found the majority of the connections on the intercooler pipework were blowing and letting pressure escape with anything over 0.3 bar. So presuming this has been like this for a while
tightened those clamps because boost leaks are the devil. Perhaps they loosened, either way hope they didn't charge you to much to "replace" them!
I love this car. Not a day goes by that I don't wonder why I sold it. Good work Joe.