I'll consider this one of the more recent posts on the topic of a home-built flip over using an Eskimo skin.
I have one as well and have a few questions regarding the sled size and orientation. The manual lists the sled as 50" long and 32" wide - I haven't quite found a sled to match yet but I'm still looking. I'm also thinking of building my own deck/Smitty Sled to fit it - or possibly just let it free stand without a sled plop it on the Smitty when I intend to use it.
For the bows I plan on using (5) 1/2" EMT - cheap, accessible, easy to form
The hinge can vary from a metal L bracket similar to OEM or a plywood triangle
Fluff like the seat will be lost and a cooler/seat will double down as they get dragged out with the Smitty anyway.
Has anyone here fabricated their own flip over using the Eskimo skin? Can you share pics or text of the experience?