Just my thoughts and in no way am I saying I'm right. But I feel comfortable with it.
I stay away from the nodes on both ends best I can. Reason being, often there is a bend, flatspot, or offset on many that I have used.
Feeling that having a groove for the string in-line with the main shaft could be a issue at times in the above case. I also match a flat top / bottom of groove to try and maintain nocking point location with the shaft's center. The variations in diameter (plus bends, off-sets, etc.) can effectively move the nock center according to diameter if I don't.
Since these arrows become so time consuming I figure wraping is cheap insurance and so I wrap.
As mentioned, I couldbe wasting my time,, but feel comfortable going this way. There is a lot of variations with Boo from shaft to shaft. Getting as much as possible in my favor seems like the way to go.
Here is one of shafts in progress that shows what I try to achive:
Far from perfect,, but I'm working on it.