Mann,too many folks work on fast,instead of working on sure and/or smooth.
Watch a really good shotgunner sometime. He/she will have little waste movement, no jerky moves, and no undue haste.
Agreed on a mentor. Since so many folks have trouble finding one,I've been writing this series to serve as a poor substitute for a Shotgun Sensei. Not that I'm a Master, just an advanced student with a compulsion to help others...