Scota,

I have a big bird with Kevlar pull/pull on the rudder. It was a purchased kit. The one down side I have experienced was that the cable did not stand up too well to abrasion. I had to replace both sides after a year or so. The second set has lasted longer, but I inspect them frequently.

I do not subscribe to the high tension design approach. Once you have the slack out of the Kevlar, more tension is only adding stain to the servo and surface. My bird is a slow flyer. I assume your Fokker is too. I cannot imagine real high loads requiring all that much tension capacity. Geeze, you are not hanging the model from the cable!

Have fun!

Bedford