Your first reply told you that you would get many different answers. Now you know why. It really is personal preference. On my arf's I use CA hinges. I have been flying a Great Planes 25% Patty Wagstaff Extra since spring with CA hinges and have had no problems whatsoever. When I build a more complex scale model I use either Robart or Klett hinges depending on the subject. Another point I continue to mention but no one really seems to care. Is the warranty issue. If your plane goes in due to hinge failure I don't think H9 will back up any warranty claims if any thing other than CA hinges are used.