I was a cable data and VOIP tech for the last 4 yrs, I have made hundreds of these cables. Its is a pain in the a$$ until you get the technique of how to hold your color groups in one hand between your thumb and finger in order, and then slide it right into a connector. It took me a few until it became easy, but by the hundredth or so they are second nature, you will do it while talking on a cellphone!