I have henning style pipes on my cb 350 racer,the fiberglass and perf pipe was removed and suppertrapps were instaled. I would like to go back to glasspacks. To repack do you use a light fibre like insulation, or do you use a heavy fibre like chopped mat or cloth?Should you try to fit as much fibreglass in the muffler as you can, or do you pack it loose? If the supertrapps were reinstalled would it be worth it to put a cone in the muffler where the perf pipe was to finish the full length as a smooth tappered cone? Steve