I have never heard of turning you poundage down to bareshaft tune, nor would I suggest it. Bare shaft tuning is really more for finger shooters but can be used with a release. It is a good way to determine if you have proper spine for your set up. I wouldn't be as concerned with whether the arrow kicks one way or another when shot, but more where it impacts the target in relationship to the fletched arrow. And remember there are no set rules with bare shaft tuning with a release. You may have to try the opposite to get things to work correctly. And I would suggest working on your nocking point first, then work on your windage.
When I bare shaft tune I take a fletched arrow and trim the fletching off, leaving the base of the fletch and the glue on the arrow. This helps retain the weight but get rid of the steering. With feathers you retain almost all of the weight since most of the weight is in the base any way.
Along with the easton tuning guide check out this link as well.
http://www.bowhunting.net/bobragsdale/ragsdale.html
Also remember that in order to do this sort of tuning you need to shoot pretty well to begin with. You need to be steady and have good repeatable form or you will be adjusting things to no end. If you can't shoot 5 fletched arrows in a close group you won't be able to shoot fletched and non fletched arrows together either since it is harder. Many don't take this into account before trying bare shaft or fine tuning. The truth is any bow can be shot well whether it is tuned well or not, it just depends on how well the person can shoot. Tuning only makes it more forgiving for slight errors in your release or form.
Good luck,
Paul