Replacing rather than repairing modern German movements is far better for both you AND the customer for the following reasons:
The two year warranty will enhance your reputation, and with improvements in the new units, you are sending out a clock literally BETTER than when it was new.
Replacement will REDUCE your turnaround time to days instead of weeks or months.
You are giving the customer a NEW clock at a repaired clock price.
The lead alloy nickel plated steel in the old units has been replaced with hardened steel and improvements were made in the brass formulation. Hermle now uses a REVOLUTIONARY 2nd wheel consisting of a repivoted plug which is so hard a file will not cut it!
Your PROFIT is guaranteed when you quote the job. There is no guesswork on time and materials or what could go wrong.
Warranty/comeback problems are ELIMINATED. Your repair comebacks eat time and money, aggravate the customer and hurt your reputation.