Custom CAN Devices?

[MetaEngineer]

CAN bus is great for many things, but high bandwidth is not one of them. Small amounts of data such as motor controller commands and sensor data can be moved with low latency, but it will struggle with a video stream. Last year a code bug early in development resulted in a flooded CAN network on our robot. Very laggy and unpredictable behavior resulted as the network hit its limits and could not update frequently enough.

As bobbysq said, there's no bandwidth limit on the bot itself. Only transmissions between bot and field are limited to <7 mbit/sec. If you are really tight on weight and space, you can use the second Ethernet port on the radio to feed data through to the RIO. It works quite well as a switch, though you lose that port for tethering.