Honestly, try to follow the article, but realistically you will only understand it if you try tanning thick hides, my way, a few time. This is my method of tanning moose. The process is just as you would tan a deer hide, but everything from wait times, to wringing, to measurement is trippled if not quadrupled. The only other difference is I avoid tanning a whole hide at once (I've never tried it using this particular method), and instead of using a doughnut and two poles to wring the hide, I cut strong slitts on the border and wring the hide by securing a few of these at once. Cut the hide into a half (or quarter if your a small person) unless you absolutely need or want a whole hide; in which case, the drying process would need to be done by framing the hide. A split at the waste (or center) is easer to work, maneuver, store and you're going to cut the finished hide for projects anyway.  All the hide must be scraped; the parts not to be tanned should be cut away and discarded ...