It isn't rocket surgery. There are a ton of videos out there showing how to set one up. I got mine immediately following my OW class 10 years ago and put it together on my own without issue. The only tweaks that were made later by a local GUE instructor involved re-positioning the front D-rings. The most common mistake seems to be people making the shoulder straps too tight, and then having to struggle to get into or out of the rig.