I believe you are correct in your thinking on this Navy. I time my rest by shortening the lanyard until my point of impact doesn' t continue to elevate, then continue about 1/4" shorter to allow for any stretch that might occur. You can delay the timing even further with a spring setup if you wish, without directly putting additional tension or tourqe into the cables. This is how I have mine setup. I time mine much different than most people do. The rest is up 6 inches or so before full lock. At that point this spring starts to really do its thing. The spring is a Briggs and Stratton 260695 (governor spring). I had a broad assortment to work with and I found this to be the best match, although I wish it was a smaller diameter and had a CHROME finish

. The spring rate is correct though.
-Chief