RE: D loop issue now!!!
100% agree, make sure the knots are on opposite sides. NEVER put superglue on your serving or loop. It will deterioate it. Don't ask me how I know this[:@]! I will tell ya, punching yourself in the face, hurts LOL.
Another thing you can do, put a couple small notches on a set of needlenose pliers, align your peep and loop, use the pliers to tighten the heck out of the loop. It should not come loose.