no never been to brandywine im in bozeman mt., just read about it over years.
you can mod a longer track on that sled, $250 for the kit and $500 for a track. at 5000+ km that top end is getting to the end of its life. Rebuilds aren't that hard but still $1000. so after you put that money into it you could have gone out and gotten a newer sled with a longer track.
in the deep heavy snow in whistler that summit 670 with a 136 track will get you into zones, but not up them. talk one of your buddies into getting a big sled to double on.
it would be a great starter sled, offer the guy 750, rip it for a year then sell it and upgrade once you know what you want.
i've been looking at the utility sleds as my next purchase. i think it would be cool to tow in gear into a zone and set up camp with a wall tent and a little stove.