Chris, I have always run hyfax on my Otter’s for over 10 years now. Absolutely love them! I have a Magnum and cottage Otter. Here in Iowa there are years where we have little snow and years with a ton of snow. I feel the added protection on the bottom is worth it. I pull my shacks with an ATV and have no worries pulling my shack long distances across roads and other rough conditions. They also protect your tub on rough ice conditions.
Pretty easy to put on… I recommend putting them on with your canvas/bars taken off.
The only minor down side I have seen is the screws/washers holding the hyfax on tend to rust over time when you get water inside your sled. It doesn’t hurt anything but a simple fix would be to swap out the hardware with stainless steel.
I highly recommend putting them on and will definitely prolong the life of your shack.
Good luck!