Yeah I've done it a few times. Start quite a bit nock high and work your way down because you'll get more false readings if you're close to square. Depending on how you release you're probably gonna be over 1/2" above square anyhow so start about 3/4" or a little above and slowly work your way down. A right tear that wont go away could be from too stiff of an arrow and maybe even a yolk tuning issue. If the spine is stiff then increasing the poundage will solve it. Make sure you tune with a good straight arrow because if you tune with a crooked one then you'll have a heck of a time.