Mike did mine think I paid him £100 cash, so would tally with Andy's 3hrs.
Worked first time. Funny story behind it, that I said to Mike I would never tell, but its been a couple of years now so thought I would share.
I dropped the car round for the DBW fittment, and this was the first time he had done one, so he was hesitant. Anyway, I knew it would be hours so I walked a mile or so up the road, found a pub and settled in for an hour.
Upon my return, some 3hrs had passed and I found Mike locking and unlocking the car in a bit of a state. Upon asking what the problem was, he explained that he had cut into the loom and spliced the DBW into but when he tried to start the car, it would not start and he had been trying for ages to find out what he had done to cause this.
I got him to show me, and he sat in the drivers seat and turned the ignition on, then twisted the key to start and exclaimed, 'Look, nothing!"
At that point I calmly reached across him and pushed the START button on the consul and the beast roared into life!
After I picked myself up off the ground from laughing he made me promise to never tell of the event....sorry Mike, I have held it in for too long.
On a positive side, he looks after all my cars, and trust him implicitly. He is human and has made the odd mistake, but upon calling him, hes in the car and down to me straight away at his time and expense to rectify any foibles. Not many garages would do that.