Billable freight using Route Code

Hello,

For some of our customers we implemented billable freight using a separate scheme - not linked to any carrier. We found this functionality quite limited since it will accept only one scheme. We now get questions if it is possible to setup multiple schemes, for example: one for packed goods and one for bulk goods, using for example field "Route Code" (system 42, type RT)?

Alternatively, could it be possible to have multiple rates attached to a rate schedule, one for payable and one for billable? Why 2 different rates, we charge our customers a different rate compared to agreed rate with carrier.