Below is my ranking for internal doctors based purely on
personal opinions. These were the only doctors I considered for lengthening given their popularity in cosmetic CLL circles.
I had in person consultations with half the surgeons on my list, and looked past their personal styles because I knew they were all experts--it came down to (1) money and (2) logistics.
Tier 1 - Paley, Guichet, Betz, Baumgart
These guys are innovators in their fields, all have invented or had significant inputs into the creation of a nail. Main reason is they have lots of experience performing this surgery.
Tier 2 - Lee, Mahboubian, Monegal, Birkholtz
Up and coming doctors, and future Tier 1s. They are very young for orthopedic surgeons, so their weakness is having few to moderate amounts of bilateral LL cases using internal nails (as of Jan. 2016). If they continue to have a successful career, I think they'll eventually do the most cosmetic implants in their respective countries.
Recent American Academy of Orthopaedic Surgeons (AAOS) surveys have shown the average full-time practicing orthopedic surgeon is 49.2 years old and the average age of part-time orthopedic surgeon is 66.7 years.
You'd be in good hands with any of these guys, though.