I have never used roller skids, so maybe my logic is faulty...but I dont see how roller skids can offer any advantage over "regular" skids..
1. on a snowy driveway, there is very little friction anyway, so regular skids just glide with very little friction.
2. wheels in place of skids could easily be jammed with snow and ice..making them jam up and not turn, which would wear flat spots on the wheels.
3. snowblowers are self-propelled! you dont have to push them anyway!
so why would anyone even need rollers in the first place? the power of the machine is WAY more than enough to overcome the miniscule friction of skids on snow..from the operators point of view, I dont even see how you would notice, or need, the difference..
So..I just dont see the point of doing the conversion, I dont see what you would gain, and I dont see any advantage over traditional skids..(and there is one disadvantage..the potential for the wheels to lock up)
Skids have been used for 50 years, there is nothing wrong with them..I think its the best way to go! "if it aint broke, dont fix it!"