I did a new build last year. My third snowbike but my first with all new bike and parts. Took everything I learned from the first two bikes and built this one right. Ended up with mostly c3 items and some other brands but ordered through them. Even with shipping to US, it was cheaper due to exchange rate and buying everything from one place and so shipping all at once. Have c3 brand of the following: thermostat, heated bars, upper and lower bar clamps, handguards, handshields, intake, footpegs, and then also ordered some other stuff like plan b gas can, handgrips, battery boost cables, etc. Only a handful of things I sourced elsewhere like selkirk engine surround/skidplate/heat exchanger, earthx battery, trail tech voyager gauge and pelican case.
There customer service has been top notch. Kevin shipped a warranty replacement for a leaking fitting while on Christmas vacation, and Ty has been great to bounce R&D ideas back and forth and answer technical questions. And I can say, after running all that stuff all last season, I wouldn't change anything!