Horton..and you thought you would never turn 3 ball...congrats! If you made it around 3, you can make it around 4!! Pretty darn goo skiing if you asked me.
Regarding the gates, I tend to agree with you. Stick with what you know and possibly modify it if needed. Go back and watch Andy Mapple's slalom video...he runs 39 1/2 off starting in the white wash seeing "if I can make something out of nothing". Of course he is the all time GOAT. He always claimed gates are not "the be all and end all".
This season, I am having more luck at 39 than I ever have. What I have noticed is you do need to create more speed through the gates and outbound to 1 ball and you cannot (at least I cannot) turn at the buoy. In the past, if I was late out of 1, figured I was done. In reality, even if down course, turn the ski hard and you will have sufficient angle to get to the next buoy. I feel later and further down course than 38, but getting used to it and not giving up thinking I am too late. I have been getting some coaching and for the gates, have been told to establish angle with an early, progressive turn in, then go hard. My problem has always been to go too hard too soon for the gates.
The more you attempt 39, the better you will get.
On a side note, watching you on that Denali, makes me want to give one a try. It is working well for you. Nice skiing.