Lunchbox Space Truss on Irregular Surface Not Respecting Irregular Boundary

Hi, I created an irregular surface in hope of applying the Space Truss 1 command from Lunchbox, but it would not respect the surface boundary even though it follows the curvature of the surface. Any ideas on how to set bounds to those trusses? Your help would be very much appreciated!

Build 6 - Flexible Shape.3dm (78.0 KB)
Build 6 - Flexible (21.1 KB)

Update: I divided the surface into a smaller and less complex surface so Lunchbox can read the surface properly and it works fine already.

Something to keep in mind is that LunchBox generally works on surfaces, not trimmed surfaces.