RE: fixed vs. expandable
My suggestion would be to stay with a quality fixed broadhead like the NAP Thunderhead or Muzzy. Expandable or mechanical broadheads were created for those who can’t or will not take the time to tune their set up. Miss matched equipment or the need for speed is more important to some that a tuned, forgiving bow. On broadside shots a mechanical is marginal at best and on quartering away shots, well good luck. Will the blades open how much energy will I loose and what if I hit bone are all questions you have to ask when shooting mechanicals. If you spend a lot of time scouting, practice and thought for stand placement, the last thing you want to do is shoot a broadhead that MAY work when you have the opportunity for a shot.