Backlashing is a symptom, but what is the cause?
Figuring that out will make you alot happier than being an expert backlash knot remover. When I was first using the casting reels, I never took it to areas thick with vegetation or rocks that would disturb my cast. Usually a backlash comes from trying to compensate for something in your way like a branch or bank, and you tend to whip your wrist or arm at the wrong time causing backlash.
Try to become an expert at long-distance casting with nothing in your way, learning the spool release tension and drag system. Then you can start the finesse casting in tight situations.
Another thing I learned is the underhand lob cast. This can be done one-handed while facing the river sideways with your casting arm toward the river. Start with rod tip about shoulder height opposite where you are casting, and just give it a gentle underhand swing. When the pendulum reaches close to its axis you'll feel it- release. This method helps to get an idea how much tension is needed for a successful cast, better than the overhead whipping cast point and hurl.
Hope that helps, I'm kind of ramblin' on-

HT