was the bow floor tillered before you put the sinew on,, if you have room to take off some wood,, just even the reverse tiller a bit,, it will let the sinew pull reflex a bit better,, and make it easier to brace the first time,, if the bow was already tillered some before you put the sinew on then you are good were you are,, I dont think it would hurt to tweek it up just a bit in brace if you want,, I usually do as the sinew is drying,,just dont go crazy