Tricky one this - I sell sometimes bulky but generally heavy items, I'm currently using a weight-based shipping plugin which sort of works really well but only if customer just buys one item, which generally they do. However if they buy two or more, the shipping charge fails because usually the weight part is ok but the option fails due to the physical size or the weight option fails due to the extra packaging weight needed if they order two. What this means is that i am 99% safe if they order one product but if they order two of an item, I can pretty much guarantee I will lose badly on shipping. Bumping up the weights does not work as this then messes up the bulk of the single item orders. I have no idea really what this needs but do know it needs something as I use Royal Mail and Parcelforce almost exclusively and RM weight only goes to 2kg before a massive hike in prices happens, they need a 3kg option but thats not likely to happen. I have tried using MyHermes but customers complained so now thats only a customer option and so far nobody has selected it Any ideas for shipping ??? Some sort of non-linear weight based option so 1x product = 1kg, 2x product = 2.2kg ????