I understand the need for tinkering... I just don't have the time or desire. I like to concentrate on the target...animal and have yet to find that my fletching has an effect on my accuracy.
Some times i'm not accurate.. I get that, but I realize that it is me and not my fletching. I have never thought "if I had only been shooting **** fletching, I would have made that shot" I guess that is just me.
I get my set up as good as I can with a quick tune and then may make adjustments a little at a time over whatever time it takes. I try not to rush as with anything, the more data you add to an investment, the better you will be able to get a medium.
I know, everyone knows exactly what their draw length is and they shoot the same every time.. I must be the exception.
BigJim