MM, I'm at essentially sea level. I could swap my NIB OS 46AX for a 61FX if it would be better. The O.S. site shows the 46AX at 17.2 oz WITH muffler (no weight w/o) and the 61FX at 19.4 oz but they don't say whether that's with or without muffler. So we're looking at a weight delta of 2-4 oz. Will that effect things much?

Randy