The impact points between the bare shafts and the fletched shafts is what is important. If both are grouping well together then move back from 12 yards to 20 yards and shoot the bare shafts versus fletched shafts. If they are grouping together at 20 yards, then you should be good to go. If not, then make the proper adjustments. Keep in mind that you can only tune as well as you can execute good and consistant form. The bottom line is how well your BH's shoot with respect to your fletched shafts. Seems after retuning my set-up for BH's, then I have better flight from both my fletched and bare shafts. Often times I forgo bareshafting and go straight to tuning my BH's relative to my fletched shafts.