Like Pat, I use a long string very little in the tillering process. I go to the short string quickly and to full brace. From there I "feel" the bow into final tiller because I use a tapering method and only have to reduce weight.
Like Pat stated, full draw tiller is what you want. But the one thing I've noticed is after I set my tiller at full draw my bows are usually positive tillered between 1/8" to 3/16". Guess its the way I grip my bows. I use a medium grip.
ART B