[EdZ]

I always have difficulty transfering the weight to the left and finish the swing all the way to the back. I did some experiment and found that if I used a narrowing stance, I can transfer the weight easily from the downswing. I used to have a wider stance. I also saw some pro hitting balls with a relatively narrow stance with the left foot flare out.

Is it true that narrow stance (relatively) transfer weight better than a wider stance?

A more narrow stance makes it easier to turn in both directions and most people are not flexible or athletic enough to use a wide stance and get 'full participation' from the pivot.

A good 'swing' keeps you in balance, regardless of how wide the stance is. Using a wider stance to fix a balance problem is a band-aid in my opinion.