1. Is there anyway to "tie down"( for lack of a better word) a flash if it cannot be removed from the bridle? I would like to try riding without a flash on and the one on my bridle cannot be removed.
A: You can buy new cavessons for your bridle. Such as on statelinetack.com or chicksaddlery.com.
2. how tight should the brow band be?
A. It doesn't need to be super tight. It's just there for added security. Ideally you might want to fit 1 or 2 fingers between the horse's head and the browband. I like to keep them fairly snug to keep my horse's ears from flopping. This would be more for a show ring if you show. If you just trail ride it can be as loose as you want it to be.
3. how do you find the right length to have the cheek straps (? the part that attatches to the bit)
The bit should, ideally, be snug enough to put either 2 wrinkles at the corners of the mouth, at the most, and loosest would be either one wrinkle or no wrinkles if you like. Just experiment with different lengths and find what your horse rides the best in.
4. due to bad storage on my part, one of my bridle's noseband has bent so it's sort of at a downward angle, are there any ways to bend it back?
Try to bend it as much as you can with your hands, then use it like you normally would. It will eventually go back to normal shape with use. This happens to my equipment quite often.
Let your walkin' do your talkin'