RE: Determining brace height
If there is a very slight kick to the fletchings. If they kick to the right (if you shoot righty) increase the brace height by 1/8" at a time until there is no more kick. If the fletchings kick to the left, lower the brace height. You will also need to find the correct nock height. If the arrow nock is kicking up, lower the nock a 1/16th" at a time.
But like I stated. This will work IF your arrows are close to the proper spine weight. If they are too over spined you will need to add weight to the tip to weaken the arrow spine enough.