Nope, didn't follow any online guides. Just winged it. The most important component in my experience is the rods. They must be absolutely stiff (metal). I tried PVC tubing first and it either flexed too much, was too bulky, or shattered in extreme cold. Also, a good durable tarp overtop your gear and a way of fastening it to the sled is paramount unless you want to be lugging extra weight in snow-chunks.
I use the pulk to cart around my double ropes, ice screws, tools, gourmet lunch... when I'm ice climbing in Northern Ontario. Hoping to use it in Temegami this season too... the "Little Siberia" of Ontario.