A big "danger Will Robinson" on this concept; over thousands of posts on multiple forums folk have been unable to agree which modders know their arse from their elbows. My suspicion is that they're unlikely to start agreeing now. To this day, Big Red Joe has his cheerleaders on other forums, yet he is banned here. Go figure.
I do avidly encourage people to try the TZ course or whatever, try to learn some skills, practice on their own watches, and in time learn to help their mates out - for which they will earn eternal gratitude. And it's a hobby, you get out in satisfaction what you put in.
I am suspicious of folk that start charging hundreds of bucks five minutes after opening their first caseback. Modding seems to attract more than it's fair share of snake oil salesmen, self-promotion and shill reviews.
Caveat Emptor - Buyer Beware.