1. Yes, you can add a loop to any bow and use a trigger release instead of fingers.

2. It will only really slow the speed down if you add the dampners to the string. Limb savers, cable guarddampners etc you won't notice a decrease in performance.

3. The term used to describe the force used to draw your bow is draw force. Letoff describes your holding weight at full draw.

For example lets say you are shootingwith a50lb draw weight with 80% let off. At full draw you are only holding 10 lbs.