Prepare the macaroni according to package directions, drain, then rinse promptly under cold water. Drizzle with a teaspoon of olive oil and toss gently to prevent sticking. In a spacious bowl, add the cooked macaroni, sweet gherkins, red pepper, celery, red onion, and diced eggs, stirring until evenly combined. In a separate bowl, whisk together mayonnaise, sour cream, sweet pickle juice, red wine vinegar, sugar, dijon mustard, salt, black pepper, garlic powder, and crushed red pepper if using, until the dressing is smooth and fully integrated. Pour the dressing over the macaroni mixture, folding gently until thoroughly coated. Cover the bowl and refrigerate for at least one hour to allow flavors to meld. Stir once more prior to serving and enjoy immediately.