I would cut about 6" off skive back about 2" the reason for 6" you said the bad part is about 8" but two inches of the bad part will now be in the skive on front and back, make up a new end glue that on front and back and all the way to the end just like normal you can make the ends on the skived round or whatever just remember if it's round you need to skive that way, then stitch it up showing the add on you can thin out that front if you like but not to much it will look very nice. I'm not a Belt expert but I have done this and it came out looking better than the original design IMHO. Good luck Dwight