NIST AMB2022-01 bridge, mesh reference

Reconstruct the NIST AMB2022-01 individual bridge artifact as editable, parameterized KCL from the attached NIST description excerpts and figures; Figure 3 is the dimensioned plan and elevation drawing and is authoritative for every external dimension. Frame: x along the 75 mm length with x = 0 at the pointed (45 degree tapered) end and x increasing toward the far end, y across the 5 mm width with y = 0 at one long side face, z vertical from the build plate (z = 0) upward. Model the tapered nose, the tall solid end block, the twelve legs with their 45 degree overhangs merging into the solid bridge, the eleven 1 mm wide top tabs on a 7 mm pitch, and the hollow leg L10 with its 0.5 mm outer walls, 1 mm base, four 4 mm tall internal thin walls parallel to x, and flat ceiling, exactly as documented. Where the sources do not fix a dimension (the single- and double-track thin-wall widths), record it as an open question and use a clearly labelled inferred value with a wide tolerance rather than approximating silently. One solid; export STEP and STL. Reference geometry supplied by NIST is for inspection only: the deliverable must be editable construction, never an import.