Download Free 3D Model 3DR Solo Retractable Landing Gear Pads w/ Payload Release 3D Print Model

Summary
This attaches to the Solo’s Accessory Bay mounting holes. It can be used with or without a small breakout board like the Brownie Boards Nano. Extra space inside can contain all the wiring.
The 9G servo slides in and is held in by the unit being screwed to the Solo.
It you remove the pins from the connectors you can push the retract wires through the holes.
The info here will help you get it wired and working.https://www.hackster.io/phantom-phreak-7ccfe4/extend-3dr-solo-accessory-bay-be4073
This is the small breakout board I like.https://store.brownieboards.com/product/3dr-solo-nano-breakout-board/
Print with supports. Doesn’t require much infill. Most of the empty space it made to hold the wires.