Drag to move · 50 mm grid · Tunnel ends snap to nearby module edges · Arrow keys move selected pieces; R rotates. Elevation: drag pieces left/right; drag tunnels up/down to set height. 3D is view-only for positioning; click a piece to select it. Extras are illustrated schematically.
In Custom mode, select an enclosure in Floor plan and drag its orange side handles to resize it. Select a standard tunnel, then drag either orange end handle to change its length in Floor plan or Elevation. Tunnels viewed end-on can be resized in Floor plan. Dashed orange lines mark 1,700 mm section joins. Roof support counts only when the tunnel rests at roof height and fits over the roof in Floor plan; roof fixings still need checking.
Parts & preparation preview
DIY supply: you cut tunnel lengths and connection openings. Custom preparation adds 20% to the priced products and add-ons, including colour charges. Installation is not included. Unpriced end caps remain extra; the final cutting plan needs workshop review.
Detailed workshop notes
Order & loose-clip packing
Only loose clips are counted. Estimates use 200 mm spacing. Review the allowances below before packing.
Enter the total for connections, PVC replacement eyelets or additional loose fixings. These are not automatically counted yet.