The ability to set a single parcel weight maximum on the courier service so it can calculate the number of parcels on an order

It would be nice to be able to set a single parcel weight limit on each courier service and have this used to calculate parcel quantities on an order where the courier service is used. An offshore option may also help where the limits are different.

The only way to change the parcel quantity at the moment is "Units Per Parcel" and "Additional parcels required when despatching" on products but this doesn't work when you have different product on an order that might fit in one package and be within the weight limit.