In Desktop you could add default weights for different shipping services (saves typing the weight every time you process and order). This feature has not been added to .net, I request for the feature to be added too .net so we can start using .net integrations.
(Stock item weights are not an option for us)
This request was declined back in January of this year and the reasoning for this still stands
Here is a link to the previous request
Head of Implementation
Linn systems Ltd