Ha!
First of all, welcome to the site. Second, I want to make sure you understand the SitDrag is designed to be used on the ground. Those of us that are using it to hunt from an elevated position are going against the manufacturers specifications.
That said, I've got dozens of hours in mine this season and it feels rock solid and safe. Personally, I'd be hesitant to purchase a modified SitDrag. Not because anyone on here would deliberately deliver a crappy product, but it's inherently risky to purchase someone else's DIY job.
That said, there are a few guys that have sold/given/assisted with SitDrag builds. I have no doubt their creations are completely solid. I have even built 2 for my family members. The purpose of my soap box is simply to make sure you understand what you'd be getting into. Whatever butters your bread.
I love the SitDrag. You should definitely get one!