Basic 3D Product Prototype

I need a clean, uncomplicated 3D model of a new product idea so I can move quickly into the first physical prototype. The focus is on capturing the overall geometry and key proportions only—no detailed surfacing, textures, or moving parts at this stage. The file should be accurate enough for a low-cost print or CNC cut yet light and easy for my engineers to tweak later.

Please create the model in a common CAD format (STEP or STL preferred) and include any source files you build along the way. A short call or chat at the start will help me share reference sketches and dimensional targets; after that, I’m counting on you to translate those into a watertight, basic 3D part. I’ll sign off once the file opens cleanly on my end and passes an online printability check.