Help with splicing
 

I am looking to try and make dogbone loop. . A little like this picture below. Anybody know any good instructions on this?

http://www.caniwirigging.com/uploads...0/IMG_0197.JPG

like covered dyneema
 

Hi,

That looks like a Dyneema cover over what's likely a dyneema core. You can slip a piece of Dyneema inside the anti-chafe sleeve, making a sort of double-braid, and then splice similarly to the instructions on the New England Ropes website for Endura Braid or V-100. The cover is a little more slippery than a polyester cover, but in that picture they've done the same thing in essence.
By the way (and this is simply a personal pet peeve) I hate calling the age-old rigging toggle a "dogbone". This very thing, since Noah's flood, has been known as a toggle, and I don't think the name ought to change because we're now making them out of aluminum with HM rope loops.
Best, and sorry for the mini-rant,
Ben