That's the first time I have heard of left handed screws to "repair" a shock mount. I have used a "Heli-Coil" type insert and used fingernail polish as Lock Tite. Also.there are double-ended "bolts" that have threaded ends with a nut in the middle. I have fixed a few that way,but for shock mounts,I have drilled ALL of the way through a lower shock mount and put a nut on the end!(Traxxas).
Also works for AE rears.
Yes, I have lower shock mounts bolts come loose.
That lower bolt endures a lot of pounding.Sure,the shock mount twists a little each time.That will tend to unscrew those bolts.Logical.
The same goes for wheels that fall off.
