I have an Autocad file as a dwg link in max. Working units are in mm.
Assigning a UVW (modifier) gives a normal result without using the slicer material. (left image) Using the slicer material however makes the UVW oversized on the sliced parts. (right image) Sliced faces are marked red.
Coronaslicermtl options: cap sliced geometry on, override cap material off, no exclusions, assigned to a simple 3ds max box. Insulation material is non real world scale, tiling 1/1 and UVW modifier with the correct scale in mm's. Issue also happens on simple 3ds max objects. Not only on dwg links. Also tested it with real-world scale, same results.