Added more models

extras/cad/README.md

@@ -9,4 +9,7 @@
 **Tracker case**:
 - `aprs_tracker_e22_base` - base for tracker case without battery compartment.
 - `aprs_tracker_e22_cover` - upper cover for headless tracker with screen and controls.
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+- `aprs_tracker_e22_antenna_ring` - TPU filament ring placed under antenna.
+- `aprs_tracker_e22_base_battery_lid` - lid for battery compartment.
+- `aprs_tracker_e22_base_battery` - base for tracker case with battery compartment.
+- `aprs_tracker_e22_cover_dv` - DV cover version with holes for screen, encoder, ptt button, speaker, mic.