your question raises more questions than answers.
where do you hold the ball, waist high, higher or lower
do you have a 4 step, or a 5 step approach.
are your steps fast or slow. do you break (bend) the wrist, or bend the elbow.
do you muscle or control the swing. what is your hand position at the release point. behind the ball, at the side of the ball, or do you go around the ball.
do you let the ball go to early or to late.
are you consistently hitting your target and the pocket.
what is your league average.
what do you hope to gain by changing the backswing.
if everything is working ok for you, and you have no soreness anywhere, is it neccessary to change anything.
If you want to find an accredited coach who can help you with your game have a look at the coaches list on the TBA website for a coach in your area, or ask your State Coaching co- ordinator for assistance. If i can help you in any way my email is
allensdotcom@yahoo.com.au.
regards
Allen j