Improvement of Mega Sensor Shield V2.4

I bought a Mega Sensor Shield V2.4 intending to use the 3 XBee sockets to communicate with 3 remote units, and use the Mega's built-in USB-serial converter to communicate to the computer.

However, the USB is not available because one of the XBee sockets is hardwired to the TX/RX pair which is used for the Mega's USB converter.

I can understand that one of the uses for this board is to use this XBee to bypass the USB to allow totally wireless operation.

But it's not the only use! In my application the XBee should be connected to Serial3 not Serial.

Suggestion: add a switch to allow the XBee to be connected to either Serial or Serial3.

cheers,
Richard

PS I'm still trying to figure out to make my application work now (i.e. 3 XBees talking to remote units and one USB talking to the computer)