One thing I have learned with certain woods, they dont like long periods of being held at max draw during tillering. My neighbor hates Mulberry because he says it takes lots of set. I found that if you are really conscious about the way you pull the bow (slow and smooth) and not hold it at full draw, mulberry takes very little set. Ash and some hickory performs the same.
I use a single pulley and aircraft cable with two loops one at the end where I can set back and get a good perspective of how it is bending and one up close so I can pull and reach the limb with a gizmo. I pull to an exact mark on the draw length scale, mark one limb quickly not holding it any longer than I have too. Exercise it a couple of times then mark the other limb.