I put up some customer-provided, used, 400W MH low-bays in a body shop. Now the customer isn't very happy with them (noisy, different lamps, varying intensity, etc.) This segment of the job is finished and paid for, but they have a bitter taste left in their mouths.

This job would not even have existed if they hadn't come into these cheap used fixtures.
Is this work to be avoided? Is it appropriate to write up a release or disclaimer for installing customer-provided product?

FWIW, I have another customer that encourages the use of their 'in house' supplies - new or used - if it makes the job go smoother. I'm more than happy to in this case. I'd rather have the convenience that the run-around even if I do lose some material markup.

[This message has been edited by u2slow (edited 12-22-2006).]