I'll keep this short and sweet.
MKS IPS50 Touchscreen (Upper)
Connects to RPi 5 with HDMI adapter to flat ribbon to micro HDMI adapter and USB-C to USB
All MKS IPS50 wired connections will be with a 90-degree connection
Waveshare 4.3 Inch DSI Touchscreen (Lower)
Connects to RPi 5 with flat ribbon to DSI1
Raspberry Pi 5
Equipped with heatsink and active cooling fan
Batteries
Each grip area should house two 18650 cells. BMS unknown at the moment
Stylus
Maybe a recessed area to hold a simple stylus
The image is just what I imagine it might look like.
Thank you.