Summary

This GPS Nacelle is adapted from Eduardo Chamorro's GPS Mount.
I have reformed it to fit normal sized GPS + Manometer packages, I have used a GepRC GEP-M1025-MQ.
The Nacelle Base is for an 8mm Carbon Fibre tube (that will for my purposes will fit within an 8mm hole I have in my plane fuselage) & is fixed to the underside of the Nacelle with 3 x 1mm x 8mm screws, sealing in the GPS Module.
It could also be resized in 3D printer Slicers to fit other GPS Modules.