We are running smith cart 3.6.0 on dnn 05.03.01 (7). I have found a bug. If you set shipping to custom by weight, users can get out of the shipping cost. If you have the url for the second step in th checkout process i.e. https://chuckswoodbarn.com/ShoppingCa.... You can add a product to your cart, then browse to that url and thus skip the shipping method that is required on the cart page. It works if you go to your cart and try to click check out, but if you just add it to your cart and go that url you can checkout without having to pay the shipping cost. Can you verify that this is fixed in a newer version? If so, I will update our version. Otherwise we need this fixed ASAP considering we have shipping costs in upwards of 200 dollars.