Bare shaft tuning is every bit as good as paper tuning for a release shooter. When you find out you don't have to waste time messing with sheets of paper, clamps, tape, frames... Bare shafting becomes much better.

It will tell you everything paper tuning will tell you, with less time and effort.
When you get your bare shafts grouping with your fletched ones, then it's time to move on to group tuning and/or broadhead tuning. You can have your bow rough tuned before someone else has gotten set up and shot his first hole through a sheet of paper. By the time he's gotten his bullet hole and is just about to move on to group tuning and/or broadhead tuning, you're already done.