Since I don't feel that I'm in the minority in saying I've never heard anything regarding Dr. Catagni's capacity for CLL, I'd say, without a doubt, go with Dr. Guichet, who has a huge reputation for honesty and getting the job done safely. He has had many confirmed successful/satisfactory 8-10CM CLL cases.
Back to work in 2 months, especially with precise 2 (or any nail besides betzbone, g-nail, or albizzia), sounds downright unrealistic and misleading. With any nail, doing physical work before consolidating doesn't seem like the safest approach to LL, and, considering the huge cost of the nails, I'd recommend being as safe as possible.