Howdy Dazv,
When I set up my tillering board, I went with the AMO standard...
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AMO DRAW LENGTH STANDARD
For Manufacturers
Draw length is a specified distance, or the distance at the archer’s full draw, from
the nocking point on the string to the pivot point of the bow grip (or the theoretical
vertical projection of a tangency line to the pivot point parallel to the string)
plus 1 3/4”. Draw length from pivot point shall be designed at DLPP and shall be
called TRUE DRAW LENGTH.
EXAMPLE: 26 1/4” DLPP plus 1 3/4” is the equivalent of 28” draw.
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I believe it says that you should measure 1-3/4" above the rear (Belly side) of the handle. So, I measured from the base of where I set my bow into the slot of my tillering board and measured up 1-3/4". I used that as my zero mark. That is where my measuring stick begins to measure my draw length. That's 1-3/4" above the bottom of the slot is the beginning of my measuring stick.
I hope that is helpful,
Canoe