Recent job
Recent job: independent CTM2 at a 220-room mid-tier hotel near LAX, owner reported brew-chamber noise plus shot-volume drift. Diagnosed piston-seal wear (24-month-old machine, hotel-volume use). Replaced the seal, polished the chamber wall, regreased, recalibrated. Total: 1.75 hours, $385 parts and labor. Machine returned to factory-spec brew-volume tolerance the same morning.
Honest opinion
If you inherited a non-Starbucks CTM2 in a hotel acquisition and you are deciding whether to keep it or replace, the answer is almost always: keep it, get on a quarterly PM, and run it for 5-7 more years. Replacement cost is $50-70K; PM cost is $2K/year. The math only flips if the unit is past 10 years and showing chamber-wall scoring — then we have the replacement conversation.