When you get your UNO chip, follow the directions and beware of static!
I'm also going to recommend getting the UNO_ControlCenter Editor.
It's the best. Worth the $22. You'll thank me later.
Lastly, be aware that the UNO function of sending the Stomp pedals' CC#s on Preset Load doesn't work with GR5.
I'm not SURE why, but I THINK it's because GR5 ignores CC#s sent with PC#s.
Attached is a ControlCenter sysex for GR5.