Perch Shop Shipping

Hi,

It seems that Perch is currently adding the shipping costs onto the total cost before you even get to the checkout process if the product has Requires shipping set to true.

I would rather allow the customer to choose a shipping method during the checkout process. I have the perch_shop_shipping_method_form() set in checkout, which works fine, but I dont want shipping costs added prior to this. Is this possible?