It is my belief, and knowing Colin from back when he was teaching me at Brigs, when you work your left hand lead and play exercises off your left hand, it will fix your right hand almost instantly! I've tried it myself and it improved my right in everything else I was playing! Another reason behind this is to have you think about what you play and it makes your muscles work twice as hard to achieve the same sound quality and interp. Usually, players use their muscle memory once they get on tour because they play the same licks and parts and exercises for 60 days straight.... this is when brain farts and ticks start to happen. It's just another way to have you mentally awake at all times! And, Colin is a beast! He fixed my 8 years of bad left hand diddles in 5 minutes!!!