Subpanel Layout

So I am looking at subpanel layouts. My equipment not on the panel is all Garmin:
G3X displays (GDU 430)
GNX 375 GPS/ xpnder
GNC 255 Com1 / nav
GMA 245 Audio panel
GMC 507 Autopilot controller
G5 backup attitude

Behind the panel is:
GSU25 ADHARS
GMA245R (GTR20) Remote Radio
GEA24 Engine interface
GAD 29  ARNIC interface
GAD 27 Airframe Interface (flaps, etc)

Here is my layout.
Please provide comments on the layout, especially the pieces on the subpanel.

Thanks