I've been bitching and moaning to myself about the price of gear / bikes in general more and more recently however today is the day i realized i should have become a Dentist like my Mother wanted!! I just came across a USD 1900 (nineteed hundred United States Dollars - no typo) rear Pulley system (rear derailleur cage & jockey wheels) .... it's claim to fame you ask?..... 3D printed Titanium Ceramic......i think the part they missed in the marketing spiel is the microscopic motor inserted into the jockey wheel that adds 50 Watts for 6 hours!! I am just flabbergasted...