Pman, been there done that many times. I was wanting some input from someone who actually has made it and what if any tweaks they'd make if they made it again. Kosher salt, brand of vinegar, fresh garlic vs store bought minced or crushed, brand of olive oil. They all make subtle differences.
My go to recipe 1 cup of extra virgin olive oil, 1/2 cup red wine, 6 oz of blue cheese, 1 Tbs kosher salt, 1 Tbs crushed garlic, 1 tsp Oregano, 1 tsp of Parsley, 1/2 tsp ground black pepper.
Put all but 2 oz of blue cheese into a container that I can blend with my submersion stick blender. Blend it well then crumble the remaining blue cheese into the dressing.
You want more bite or acidity I add more salt. I pre-dress the salad with the dressing in a salad spinner.
Try making it sometime and let me know what tweaks you would make.