You made need more back spin or less, just have to pay attention to bundles when you are done with both loops. Then as putting in the twist run your hand or a piece of leather the length of the string too heat it up and get the bundles to coalesce. Then stretch it between a couple of eye loops with a ratchet strap and wrap a strand of B50 or whatever you got around the string twice and pull pressure and work it up and down the string, heats it up good and removes excess wax. Other thing I do is just watch my bundles close when I'm twisting the second loop in to make sure my bundles are still the same length, if they get off a little, you can twist the long side tighter till they are even. Other thing I do is I bought a set of pretty strong hand clamps from home Depot to hold the twists in the first loop end versus the bulldog paper clips a lot of guys use. I can't recommend enough to buy the video from Chad at Champion Bowstrings, my first string was off in length but was usable for a different bow following the instructions on the video!