Just remember I smith and my wife spins---one stop shopping! (She just got back from the Taos wool festival) Also the week before Quad-State is usually the Wool Gathering at Young's Dairy near Yellow Springs OH. When we drive out we usually plan to hit both and see the kids in between.
As far as using goes there are two makes of anvils "good ones" and "bad ones" do the ball bearing test on your anvil and figure out which "make" it is and then get to using it! (and if it's a "bad" one use it to make enough stuff to fund acquisition of a "good" one...)
Well if nobody else can I have a couple I could do tracings and measurements from; it's just they are 200+ miles from where I am usually at; and so would be a while. If you are local let me know and I can have you stop by and do it yourself sooner.