Arrowman, my tiller is always set even top and bottom. But no I did not adjust the nock point and yes I did use the same arrows. Arrow spine specifications are based on your draw weight, cam type, and arrow length. I have never heard of having to change the spine of your arrow depending on what rest you are shooting. But I do believe that a stiffer arrow would fly better with the WB because it does not allow the arrow to bend properly under the force of the launch. A properly spined arrow is SUPPOSED to bend at launch and the WB does not allow it.

I don't remember the instructions saying to adjust the nock to 90 degrees but maybe it did. Maybe I will try it again this summer when I have more time to test.