Hi Entra,
Sounds like you play a decent game and best of luck to you. Anyway, my help to you is related to your grip and the overswing. i have just made a few changes to my swing which concerns the grip and body set up. OK, what have I done? Well. regarding the grip, which was a big change, I brought it back to two knuckles. For the first few days of practice, I thought is it worth it? Well, now after one week plus I am not going back from it. It is definitely a serious change which is giving the results. By coupling this new grip with one set up change, I now have a consistent powerful swing with great distance. To elaborate on the set up change, here is what I have done. When I adress the ball, I make a conscious move of my right side to be lower than my left. At the same time, I play all
irons from wedge down to 6 in centre of stance. Very important is that the shaft is positioned in the centre of my body, just below centre of my stomach. If you position yourself correctly and apply this drill you will have to get the result you want. perseverance is the key here. Any change in any department of swing or set up, is going to be a challenge for a few days, but if you come to make progress it is well worth it. I hope this gives you some help in your quest and would be interested to get feedback on your progress, assuming you try the above changes!!!
Cheers,
Robert