Fillet Radius Gauge

This is a small remix of the model by Lorro.

• Widened the slot from 16.0mm to 16.4mm (so the calipers fit smoothly)
• Widened the front cavity (it was still interfering with the screw)
• Made the magnet holes shallower (from 2.4mm to 2.0mm) to reduce rattling — magnets are never as thick as advertised, and mine ranged from 1.58 to 1.64 mm.
• Tweaked the text a bit, made it embossed, and changed to a thicker font for cleaner printing

Small adjustments and improvements (see description).