After tiring of the leash end always slipping down around the dog's neck, causing him to frequently get tangled up in the the leash line then dangling at his feet, I went looking for alternatives. I saw a harness was the answer and saw one that was just a bungee cord with a clip on to a collar where the hooks would be. Hey, I can do that much.
Step 1: Take a Standard Bungee Cord
Step 2: Add Soft Padding
First add some padding around the metal hook bases. I cut off the tops of old socks for this, but any soft material scraps would probably work. Here the material is notched so the material does not bunch up as it wraps around the top of the hook base.
Step 3: Secure Padding
Step 4: Coat the Hooks and Hook Bases With Sugru
Coat the hooks to make them soft and most or all of the bases to permanently secure the padding. The hooks take a lot of stress, especially if your dog is very active, so it needs a thick coating there. As long as it is not so thick that one (only one) hook end can't pass through the ring on the collar where you normally attach the lease, you'll be fine. Note that in the photo I have it on a bit too thin at the curve of the hooks. I added more later (as you'll see in the next steps) and it has held up perfectly since. You can add any flourishes you like at this point, like etching patterns into the Sugru before it dries or the dog's name, or your address etc.
Step 5: Attaching the Harness, Step 1
Step 6: Attaching the Harness, Step 2
Add a standard leash through the same ring.
Step 7: Attaching the Harness, Final Step
Take the left hook, pass it under the collar and hang it on the collar, hook pointing out, to the right of the leash and other hook. That secures the leash buckle. No more tangled leash.