I would steer away from the 2017 and 2018 Camso. The suspension changes arrived in 2019 as did the side panel re-enforcements. The 2017 and 2018 basically have no brakes, like none. 2019 arrived with the plastic brake shield which helped a lot in keeping the rotor dry but had the tendency to break. 2019 also had a new ski design, the changes were minor to look at but added torsional rigidity to the ski, which helped on the trail. The 2020 uses the exact same brakes as the 2020 Yeti, same parts, they work great and it has an aluminum shield on the rotor. Problem solved. Recall the old Yetis had $hit brakes as well. The rear spring in the 2017 and 2018 is stiffer than the 2019/2020 version which uses the rising rate cam in the suspension to get stiffness. If you are over about 200 lbs the 2019/20 spring may be too soft for you but you could add a 2018 spring. The track on the 2017/2018 was too soft. It had the habit of hucking paddles. 2019 saw a new durometer track, its also the same as the Yeti despite what is being said on here. One of my closest friends works for Camso so I know.
Of all the Camso kits the 2020 is the kit to get if you ride lots of powder, not too much rough trail, are 200 lbs or less are on a budget and don't jump on hard pack. You can buy 2 brand new Camso kits for the price of 1 Yeti so you need to really think about how much you want to spend and have tied up in a snowbike. 2 year warranty is what you get. I've ridden the 2020 Yeti a bunch and I like it a LOT but it doesn't perform twice as good as my Camso otherwise I would already have one. My friend who is a product tester for Camso broke a lot of things on the 2020 Yeti last season including the tunnel, brake rotor, the shocks and a few other things as well that said he put 300 hours on the kit. Prior to testing Yeti he was doing the same job on the Camso kit. Lots of stuff broke but really not a lot more than on the Yeti so there ya go.
The Camso kit is what it is, they work great but they have no bling, are heavy, have a bad rap and aren't glamourous and have some pretty crude suspension. On the plus side they ride super smooth and quiet, have a great track and the monorail flat out rocks. They will hang with any kit out there in powder but suck on hard pack but honestly who cares about that.
M5