I'm confused. You use the OTG dongle and? microUSB to the CAT for a keyboard and mouse? Wouldn't you use a USB-C cable to connect a keyboard and mouse, or do those only go to the Pico running the screen? Also, if I use the OTG dongle, I'll have a cable with microUSB on each end. I don't know that there's anywhere on my computer I can connect that. Again, foggy brain, tomorrow. Then we can sort that out. Hopefully. Sigh...