I think you need to temper your expectations. You've been doing this for a year and were still C class 4 months ago.
If you could walk into nationals and smoke everyone what would that say about our sport in general?
If you decide to go, set reasonable and achievable goals that don't depend on other people. Stuff like "Finish top 10 in my class" you don't really control. Things like "see my sights on every shot" you do.
.140 is giant for both.
I'd try a .125 or .115 with a rear notch that big and see how you like it.
Most Bomar rears are .115 and people are running .090 to .115 for fronts
I think it has more to do with grip technique than strength. I don't see myself as an overly strong dude, but the gun doesn't move much in my hands.
I've seen big meat heads at the range struggling to control a 9mm.
One of the most important things is getting as much meat of your left hand onto the gun as possible.
Hold your strong hand loose and try to wiggle your finger as fast as you can. Now make a tight fist, or push downward with that thumb pressure you are talking about. You'll probably feel tension in your trigger finger. I don't want that.
Every month the majority of people who vote get it wrong, why would a simple scoring call be any different?
Half the people want to score the Bravos and have no idea the targets have changed.
If I'm on my own less than 10 for sure.
The format I usually do is 15-18 students and three instructors. Class is divided into three groups so you have 5 or 6 people per instructor. Lot's of 1 on 1 face time with each.
Ask one of the guys at the match to take a look at your grip and stance at the safe table before the next match, just to be sure you aren't doing something completely wrong. It's much harder to unlearn bad habits after you've cemented them in.
Then buy Steve Anderson's Refinement and Repetition book and follow the directions. It takes about 30 minutes a day of dry fire to complete the drills in his book.
At long distances what sort of impact offset are you seeing with the gun canted? The bullet definitely isn't going to hit where the dot is. That's a good reason to not cant it with a huge height over bore like you have
The frame mounted dot doesn't reciprocate, obviously this is better.
You see a lot of slide mounted dots because that is a requirement in Carry Optics division, but not Open
How much of the plate is covered by the wood? Plates have minimum sizes to be legal, and if they are hardcover then the presentation of the plate isn't likely legal at all.
It takes some time to adjust to the new gun and also tune it to your tastes. That gun is probably very front heavy and overall much heavier than your SS gun.
Also it's not a 9mm anymore. You actually have to hold onto it.
Whatever the answer is, NROI is going to clarify this in their blog within the next month or so, and it will be a DQ going forward. All of their articles are responses to Enos threads, it seems.