For some reason “So easy a fishing guide can do it” came to my mind as I installed my Hyfax runners on my Otter sled today. Here is a quick run through on the installation process. Please keep in mind that this was on my Large Otter sled. All you need is a few tools to get the job done; 5/32 or 1/8 inch drill bit, Allen wrench, hammer, 3/8 inch socket and driver, duct tape and socket extension.
I have added both the socket extension and duct tape to the installation list for further efficiency.
Per the directions included with the Otter Hyfax. Simply tap in the front end of the Hyfax in the slot located in the underside of your Otter Sled with your hammer. I pre-formed my Hyfax by bending the end slightly by hand. Drill a 5/32 inch hole through the inside of your sled. Take your Allen wrench and drive the screw with washer into the plastic of the sled. By proper sizing on your pre-drilled hole the screw will hold the hyfax in position as it grips the plastic of the sled. Now take the lock nut and washer and fasten this from the inside. This will tighten down the Hyfax in your first position.
Now here is where I used the duct tape. Doesn’t every project require duct tape? Take the Hyfax and position it straight down the middle of your runner and fasten it in position with a piece of duct tape. Repeat this process the entire length of the Hyfax runner. Now drill all the holes through the pre-drilled holes in your Hyfax, and through the interior of your sled. With your Allen wrench drive the screws and washers through the plastic. Now flip the sled over and ratchet your lock nut and washer on each screw. I found using an extension on my ratchet driver made it easier due to the concave design of the interior Otter sled.
Flip the sled back over, and remove the duct tape!! You’ve just installed your first Hyfax runner!! It took me about 20 minutes for the first runner. In theory with 6 Hyfax runners to install this will be a 2 hour job for me. Again…..I’m a fishing guide, so you might be faster. 
When you get to the middle runners you might need to have a helper on the otherside of the Otter Sled keeping the screw head from turning as you tighten from the inside. I’ve got short arms!! 
My theory on whether you should consider adding Hyfax runners is like this; IF you run your sleds across the black top or down concrete or simply want added protection this is a nice add. I don’t really notice any enhanced pulling efficiency, but will say there isn’t so much as a scratch on the bottom of our sleds with Hyfax. You truly can pass on your ice sleds to your grandkids this way!! 
But, it was still possible and maybe a little easier since I could stand the sled upright on it’s back. The duct tape trick is great. AND if you’re looking for something to make inserting the screws easy, use a T20 Torx bit in your cordless and you can screw the allen bolts right in and use them to suck the hyfax tight. I still needed an allen wrench to hold the bolt while I used a socket to get the nylon nuts to suck down tight too. But all in all, it’s pretty easy to install hyfax after the fact to your fish house if you decide too.
