I want to use package add ons in modernbill to charge for extra blocks of disk space and bandwidth. I have no problem setting these up so they are charged but I was wondering how you tie these in with the CPanel accounts, does this have to be done manually through WHM? It seems strange having this option if it can't be automated.

also do most people tend to offer this at signup or just add this on manually when it's needed and apply a charge in modernbill? is this charge easy to add afterwards or do you need to create an add on for it?