Hi Horace,
I don't think I understand how a mask would work. I've had masks working to filter the message out, I think your suggesting filtering out all but the message I want from CAN0, then edit that and send it out on CAN1.
That would let me modify the message I need to, but I don't understand how I would get the rest of the messages from CAN0 to CAN1.
What did I miss?