I got down to a 5 or better with a not so good swing. I was consistently shooting mid to high 70s. But I've always had a really good feel with my short game and putting has always been one of my stronger areas, so I got away with a lot of bad shots. Even with a bad swing, you can get consistent as long as you know what your ball is going to do. I always had the same misses which meant I could plan my way around the course and still shoot descent even though watching my swing on camera was painful.
The biggest problem I found with this is when I started trying to play in State tournaments. In my opinion, this is when the bad swing will start falling apart....or at least for me. Once there is a lot of pressure on you, the bad fundamentals will start showing you why they are bad fundamentals.
Thank you for the insight. Here is a follow up question. Were you able to repair those fundamentals without having to get worse than mid to high 70's?
In other words, were the fundamentals so bad that your handicap had to go up before you saw the fruit of your work and it went back down or even better lower than before?