Club fitting can be a helpful path to improvement. BUT... We need the clubs to not suit our swing we test with- we want our clubs to suit something else....the future. Watch this to learn why you should take some control of your fitting.
Keeping the left arm and shaft in alignment is a great key to success. In this video I show a student how to work on this and it also helped solve the way his right arm was working at the same time.
My teaching has almost worked on the principle of allowing the student to be able to understand and fix swing issues. Here is an example of that with the very visual Drill Six.
Lag- Loading- Angles.....Creating the loading of the shaft is crucial to keep the lag angle well into the downswing. Lag is your friend- IF you know how to do it correctly.