I've just done a weight comparison, the OS1.60, complete with muffler, is 2 lbs 14 ounces, the BME44, bare, is 2-11. Trying REALLY hard to not add weight, I can use a 5 ounce battery, 4 ounce ignition, move the tank to the CG, and gain 8 ounces, total weight. After that, it will be the weight of the exhaust system that ruins my day. A canister setup is 12-13 ounces (ouch).

Any suggestions on exhaust?