Gross and Net Weight fields are currently specified against an item and used to populated fields on the documents. If using Item Variants this could be incorrect (for example if using Item Variants to represent shoe sizes there could be a difference in weight between a small and large shoe). This can lead to things like weights on customs declarations and Intrastat to be incorrect. Suggestion is to put these fields on the Item variant record. If non-zero these should override the weights on the documents currently taken from the item card.