Using Boolean Union to create a solid out of 7 solids

[martinsiegrist]

Creating a Solid from surfaces or curves

I assume the inner edges would remain sharp? Here’s a definition with hollow pipes: [image] Rotating the vertical pipe by 180 degrees seems to help avoid a naked edge problem on the second fillet operation. X-Knot Weld_double-fillet_rotated.gh (24.4 KB) Can someone from McNeel please take a look at this definition? The fillet operation creates a naked edge. @DavidRutten or who else?