I understand what you're saying. But it's not the option I'm looking for. The more precise description would be as follows. I would like to use the carriercalculated method (EMS in my case) and apply additional factor(s).
For instance, the carrier method returns $100. I'd like to multiply that value to 1.01 to add 1%. In the other case I'd like to multiply by 0 (zero). In both cases the carrier method returns approx. delivery duration which I don't enter manually. I don't want to set up duration for any possible location where my goods could be sent.
From your explanation I conclude that it's impossible now. I hope that some modifiers will be implemented to increase flexibility of the system.
