Finally got some time to post here after a great weekend riding. And testing :face-icon-small-hap
Both the Mountain and Trail version of the GGB cans for the SkiDoo XM performed as promised: light weight, no engine codes set, and rideability identical to stock.
The Mountain version is slightly louder but still very acceptable and sounds really good, not "tinny" or "rattly" like some of the other brands previously tested.
The Trail version was a pleasant surprise for me, it has a deeper throaty sound (compared to stock) but is easily the quietest aftermarket can I have tried and still substantially smaller and lighter than stock. For anyone looking to lose some weight and free up some space to make room for a muffpot this model is a sure winner.
Looking forward to getting both of these on the dyno as soon as possible. As far as seat of the pants goes, they seem to be at least on par with the stock silencer, and rideability was same as stock, something that we all know isn't an easy thing to accomplish.