The Free Shipping is working ok for per Product but I cannot make it work on per Product Option (which is what I need).
On the eShop Shipping Extension setting, Package Options, I selected “Per Product Option” and I created class “Free”. I put “0.1” on Length, Width, and Height as 0 is not accepted. On the Product Entry, I assigned the “Free” class on options that doesn’t need shipping. When I tested it, the product isn’t showing so I added another class “wShipping” for the options that needs shipping. The product then appeared but on Checkout, even the options with Free class are showing the shipping options instead of the message saying free shipping.