I had my own Taxis for many years so I think through my pocket I can offer
advice .Your discs will not need turning unless they are ruined by pads worn
to the metal .No matter how scored the discs are .As long as the scores are
in not chucks missing .If you think about it you will have more brake area
in effect .As your pads are not worn out you have been ripped off .I found
many tried this on me when changing my tires ,they would suggest I have my
discs removed and turned ,gound down in fact .@ 50.000 miles they are like
new .$700.00 US dollars is a huge amount to pay .