drilling rig 3d model

Create a mechanically accurate 3D model of a Boart Longyear LF90 skid-mounted surface diamond core drilling rig (sled base, not crawler). Optimized strictly for FDM 3D printing, engineering model, scale 1:20, units mm, watertight manifold STL. Model must be fully solid with 100% internal volume, no hollow parts. Min wall thickness 2.4 mm, structural elements 3–4 mm, pins ≥3 mm. Remove micro details <1.5 mm. Simplify and thicken mast, sled frame, cylinders and hoses ≥2 mm. Replace fine meshes with embossed texture. No thin shells, no floating geometry, no enclosed cavities. Avoid overhangs >45°. Split into modules: skid base (flat bottom), mast (print horizontal), rotary head, control panel, hydraulic unit. Add alignment pegs/sockets 0.3 mm clearance, optional M3 holes (3.2 mm). Add chamfers 0.5–1 mm, reinforce structure for handling durability. Clean non-manifold free topology, Cura/PrusaSlicer ready, PLA/PETG compatible.