Thanks for the kind words, Slvrmple. Here's a picture of one of my lanyards:
I have been taken to task on another thread for using steel screw links, especially since I use ones from my local hardware store. They are 3/8 in steel, stamped with a working load of 2200 lbs or thereabouts. If that makes you nervous, you can buy a (much) more expensive version from an arborist catalog. The whole point is to keep it small and strong. Not a bad idea to lightly tighten it with a wrench.
The pink tenex you see I actually found on Ebay. It is the sling grade "two end carrier" version, which is a little softer and a little easier to splice than the normal stuff. If you go on Ebay and search for "tenex rope", you will find the guy who runs a rope store on Ebay--he might have something you can use. You can also order it by the foot from either Sherrill or Wesspur.
I used to copy the commercial eye-eye slings, where they always seem to use the Brummel eye splice in hollow braid. I stopped doing that some time ago because I couldn't find any clear documentation about that method. It is actually easier to just follow the splicing intructions on Samson's web site. The published tensile strengths of their hollow braids, like Tenex, are actually measured using their standard spliced eye.
The picture doesn't show it, but I use a micropulley as a slack tender. The books usually show this being attached to the Dee via a swiveling dog leash snap, but I didn't like the slop that left in my system. You pull yourself in to where you want to be, but you will end up 3 or 4 inches further back before the prusik cord goes taut. So now I use an adjustable loop of parachute cord to tie the pulley to the quicklink. The idea is to make the cord loop about the same length as the prusik. When you go into slack-tending mode, the cord goes taut and the pulley starts to push the knot. But the prusik cord is also taut, or very nearly so, so that when you let go of the rope, you stay right there. Nice! It doesn't matter how long your eye-eye Tenex sling turns out; you tune the parachute cord to match it. Of course the parachute cord easily "swivels" around to keep up with any odd position of your safety rope.
Show us a picture of your new safeties.