Ya, the JB Weld holds very good so far and I have jammed up the masonary bit in the brake line. The servo stalls without the JB Weld busting loose. This is the only part that JB weld has not failed on me yet lol.(knock on wood). After the first amount of JB Weld has set and I am happy with the bit spinning fairly straight with no wobble, I then apply JB Weld like this.
Here is a pic of my blade ram setup.
