Unfair to blame all snags on Kwikfit Fitters lads. To put a C check in perspective. If it was signed up as a fixed price contract and with penalties if the aircraft was late out of the hangar, it would not matter if you were an ace with more certs than you could shake at stick at, or a lowly kwikfit fitter, that aeroplane would be going out of the door purely due to commercial pressures, not because of any lack of ability on the engineers who did the work.
The problem will always be unrealistic deadlines, budget or time wise.