As I described in another thread, after putting my Phantom into a river I am literally getting a "crash course" in repair and maintenance. I've also discovered that I really don't have the best tools to disassemble the shell or the motors. In particular, I really struggled to remove the "C-clip" from the motor -- finally pried it off with a steel probe but it wasn't pretty. Then, when I tried to replace it, I snapped it in half. I have small diameter Allen wrenches but I suspect they are low quality. What size tools (and brands) would you recommend for this kind of work? If I replace the motor that appears damaged, I'll have to do some soldering. Is there a particular size iron that is most appropriate for the Phantom?