Different strokes for different folks.
Here's what I came up with.
I've been using a "double loop system" for several months now and I'm very pleased with it. My Amas don't budge
and there's no more banging. It's a simple and easy upgrade to make, looks very clean and basically I'm using exisisting parts. To engage, I simply lift the shock cord over the lower Eyelet Post, then the upper one. When I'm not sailing I take them off so they don't get stretched out. It works great!
The first thing I did was pop-rivet a second Eyelet Post (Part # 41220001 to my forward Akas. I spaced them identically to the Eyelet Posts on the rear Akas. I unscrewed my forward End Fitting (Part # 71115001) from the Ama and drilled out the center hole with a 11/32nd's bit.
(Note: If your TI came with 5/16th's shock cord you won't have to drill it out). My 2011 came with 1/4" shock cord, but with only one loop, neither are strong enough keep the Amas from bouncing up and down with any kind of wave action; very annoying.
I then cut a piece of 5/16th' shock cord 24 ½" long, knotted the end, pushed it back through the forward End Fitting and screwed it back into the Ama. I replaced the rear End Fitting with a Eye (Part # 71116001), ran the shock cord twice through the loop of the Eye, into a 32mm Parrel Rope Stop and put a knot on the end.
Looks like this: