I wouldn't hesitate to use them for any job I am not equipped to handle. I did go to mechanic school (Barnett I beleive) back in the late 80's as it was my dream to open my own shop after college. Life (and reality) got in the way of that, but I've always worked on my own bikes, built my own wheels, etc. As I get older I realize that I don't have as many tools as I once did (or I don't know where they are), and sometimes a bit less patience or time to tackle more challenging jobs. So yes, the relationship will continue...