I would like to incorporate the KK_V7235_H heatsink part with the 78MXXH voltage regulator part in Ultiboard 14.0. Both parts lay flat on my PCB, heatsink first then the regulator on top. However, I do not know how to combine both parts. Currently when I place the regulator footprint (U4) on the heatsink footprint (U1), I receive the expected DRC error "Design rule error: Parts 'U1' and 'U4' are too close to or overlapping each other." Is this related to the 3d aspect of the parts, because typically I get a pin overlap error (in which case the pin holes themselves would be red-circled.) The red circle highlights a physical corner of the U4 footprint that overlaps U1.
Anyhow, does anyone know of a solution to this problem? Do I need to make one part that combines both footprints, or a thermal pad that just represents the part of the heatsink instead of the actual part? I already created a Multisim custom part for the heatsink, so the two screw holes for each part are "connected" in that sense.
Thanks
-Anthony
