Part 1 of 4 GP7/9 upper speaker body mount

1 of 4 parts to build the upper speaker enclose to mount a Visaton FRS 5 in a G scale USA trains GP7/9. This is the mounting base that gets bolted to the existing mounting holes in the top of the engine and the first part installed. it is designed to use 3- 3mm x 5mm thread forming screws. Sorry about the orientation I'm new to 3D drawing just rotate 90 deg on axis X