This design is a remake of the Landing Gear Unit. It's now fully enclosed to stop any light bleeding through the open lever hole. I have updated the design to make it simpler and better. The Handle or the trigger can be used to operate the unit. There is now an LED in the handles to light the handle wheel. 
 
This file includes CAD & STL Files.
 
The Build guide can be found here:
https://www.737diysim.com/build-guides-1/landing-gear-panel