Hi there, noticed today that since you're having the 10% deal (awesome) just experimenting with cart options. I noticed since there's no option to add the C4S option to the S.e.x. kit on the S.E.X. order page it adds another 15$ in shipping costs in the cart by adding it separately. Vs say the crack kit has the option of adding the speedball upgrade for no change in shipping. More of a heads up as I'm guessing throwing in the c4s to the s.e.x box to ship adds almost nothing to weight. Maybe add the option on the website to add the C4S upgrade to the S.e.x kit page?