15 years ago my kitchen was totally renovated by a kitchen renovation
company. The sink is an undermount, asymmetrical double sink. There is
one hole for the faucet. I had the original faucet replaced last year by
an identical one (replacement unit by the company for a failed
product). My plumber told me that the sink had not been trimmed to allow
easy installation of the faucet when the kitchen was renovated. He had
to fold back one of the metal corners of the undermount. Now the
replacement faucet has failed (exactly one year later). My new faucet
will not fit into the hole because of the intruding sink metal. The
first two identical faucets were "horseshoe" mounts, where the half-ring
could, with great difficulty, be fit around the intrusion. The new
faucet is continuously round, and needs the full round hole to mount
into. The bit of metal prevents that.

I talked to the owner of the
renovation company. He said it was practice to fit the faucet I chose,
and it was not a good idea to cut into a sink unless necessary. I would
have thought that trimming around a hole would be necessary overall, if
not immediately, and was done to speed the job up and avoid extra work.
He denies my assertion of poor workmanship by his company. He suggested
I find another faucet with a horseshoe mount. Groan - it wasn't easy
finding the one I chose.

My plumber wants to take the sink out
and trim the sink edge. He says that just grinding the metal to clear
the hole will not solve the problem since the faucet mounting parts
under the counter need a flat surface to tighten against. The metal
edges prevent that. Does anyone have any experience, advice, suggestions?