Here's a drill I came up with on the fly. Originally I came across this idea for helping bowlers who bowl off the wrong foot to get a feel for timing their landing.
One day, a spinner asked me if I had an ideas for helping him brace and pull better against the front side of the body. It was a timing issue the same as bowling off the wrong foot. We tried this drill and it instantly got more spin and a feeling of power through the action. Great teamwork!
I share it for others to try.