I would need it to charge in the BASE currency only as those are the currencies we accept, and the order currencies are mainly just for convenience to show customer the value in their own currency

Perfect it works thanks! In Magento I would need it to charge in the BASE currency only as those are the currencies we accept, and the order currencies are mainly just for convenience to show customer the value in their own currency. How do we set that ? thank you

You can do it from the 1.5.0 version.