>>>I propose new customers should promise to:-

Pay when the job is finished.
Not phone every 5 minutes.
Not expect free diagnosis.
Understand vehicles are complex.
Be polite.
Answer the phone.
Never patronise(my mate down the pub, read on the internet etc)<<<

Brilliant Phil and I totally agree with you.

I would have one or two more to add but not right now.

Well said.

Mike