In my opinion One rig design mounts and  rail mount spring style scratchers are the way to go for Polaris sleds      Easy to store   Easy to put down  and cheap to replace   

I have both styles too. . These came with machine so style new to me. Defiantly simple and effective to work on or replace. Spring ones are nice too but if you break it, it's a nightmare to change them out behind torsion springs. 

I have the same cable style on one machine. I like them, very durable and the tips wear is limited. Different opinions out there but I prefer them over spring style. 

Thank god for scratches yesterday..Polaris never went over 105 F . I am impressed how cool these new 650 run. 

Picture a 44mm. Mikuni Carb!