Thinking about building 3" rocket with 54mm MMT. If I were to put Aero Pack's 54mm flange mounted retainer, the flange is about the same diameter as the airframe. I.e. no room for fillet on the aft centering ring. Anybody did this? Any issues without fillet? Did you somehow managed to make a fillet? Or should I simply go with "regular" glue-on Aero Pack retainer?