Yes, put the hyfax on first before anything else. Here are the rest of my mods:
1) I’ve secured a board with self-made PVC rod holders against the back wall in order to keep half a dozen rod/reel/bait/lure rigs ready to go.
2) Added some eyebolts through the back wall so as to attach short ice screw tie outs when I’m hand pulling early and late when it’s windy.
3) Added both bow and stern plywood transoms to spread loads when towing heavy loads long distances over rugged ice.
4) Added a rain gutter the length of the sled just behind the front (when seated) lip to store the tent rods when not in use as well as a place to put things off of floor while fishing.
5) Added LED lighting to two overhead bars as well as on the front side under the front lip (again, when seated) as well as a small well (plywood) for a 12V 18A accessory battery used for LEDs and underwater smelt light.