Wait a minute. If you want to INCREASE draw length by modifying the handle exclusively, you' d have to REMOVE material between your grip hand and the riser.

There would be NO increase (or decrease, for that matter) in speed because there' s no change in the power stroke of the bow. You are simply changing how the bow fits you. The problem with that is that you have to " over-extend" yourself just to get the bow drawn back to where it was before. The anchor point MUST change (or you' ve got to stretch your bow arm out longer). Either way, your body is NOT going to be in the same position as it was.