Took one of the reasonably similar draft ones and adapted to your measures. Posted in SF 3D models 414. Named materials for removal of handrails. Cutout based on your dimensions (see .sh3d file.) It might fit (if mirrored). If anyone else needs this model, it probably should be adjusted so thread/construction/risers are separated. ok
.sh3d file (with cutout/planicon) staircase_u2.sh3d
.obj file: staircase_u2.zip
