Assignment
Create a base and separate removable lid for an electronics enclosure. Base exterior 80 x 55 x 25 mm, outer vertical corner radius 5; open top, 2 mm floor and walls (inner corner radius 3). Four cylindrical mounting posts outer diameter 7, extend from z=2 to z=10, centered at (x,y)=(+/-30,+/-17.5) relative to centered XY footprint; each has a diameter 2.5 blind hole down to z=3. In the front wall y=-27.5, cut a 12 x 7 rectangular port centered at x=0,z=10 with corner radius 1. Lid plate 80 x 55 x 2, same outer corners, with an underside locating rim 1.5 thick and 3 deep, outer rim size 75.4 x 50.4 with radius 2.7. Display the lid upright, underside down, translated +100 mm in X, lowest point at z=0. No screw holes in lid. Export base and lid as separate STEP solids and combined STL. Length tolerance 0.1 mm.
