most often, the chassis feet are missing from old FLUKE equipment. these are *.stl files for
1. FLUKE 540B (set of 4), best to be printed in TPU95. 40% infill, brim recommended.
2. FLUKE 5450A (1 piece), best printed in PLA or PETG, 40% infill. TPU95 isn't rigid enough. also fits 343A and other instruments in same chassis, and has side-rail for intrument-stacking. needs raft and brim to print properly. the three locator pins are slightly too long, simply snip to desired length.