Lens Cap Board (Cine + Stills) - Backstage cart lip (one piece, strongest)
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What it holds: Hanger for the lens cap plates (plates hang in front of it)

PRINT SETTINGS
  Filament:  PETG
  Walls:     5
  Infill:    35% gyroid
  Orientation: the files are already oriented for printing. Put them on the plate as they load;
               don't rotate them.

FILES AND SUPPORTS
  - clip_NB_hanger_lens_cap_board_hanger.stl  (supports: no)
  - clip_NB_plate_front2_front_caps_x2.stl  (supports: no)
  - clip_NB_plate_PL_front_cap_PL_rear.stl  (supports: no)
  - clip_NB_plate_LPL_front_cap_LPL_rear.stl  (supports: no)
  - clip_NB_plate_stills_pinch_cap_EF_E_rear.stl  (supports: no)

HOW IT MOUNTS
  BACKSTAGE CART LIP (ONE PIECE, STRONGEST)
    The cart-lip slot is printed into the holder, so it is one piece and as strong as it gets.
    Hold it tilted, hook the slot over the upright lip on the edge of a Magliner / Backstage-style cart
    shelf, and rock it down until it sits flat against the side.

    Notes for this holder: Default: hanger in one piece with the Magliner/cart lip mount, strongest. Print the hanger plus the plate(s) you want (2 front caps, front + PL rear, front + LPL rear, stills). Hanger prints on its end, plates flat, no supports. Optional 2 x M5 thumbscrew lock.

HOW IT WORKS
  Somewhere for caps to go during a lens swap, so they don't end up in your pockets. One hanger hooks on the cart lip, and a flat plate drops into it like a window pane: top edge up into the 18 mm groove, bottom edge down into the 6 mm channel. To swap plates, lift about 7-8 mm and swing the bottom out. End stops keep the plate from sliding along the cart. The caps' weight tips the plate toward the cart, so it can't fall forward.
  Plates (print the ones you need):

  - front2: two universal front-cap nests. Each nest has three concentric rings for 80, 95 and 114 mm push-on cine caps (also matte-box sizes). The cap pushes over its ring like over a lens front, and its skirt drops into the gap outside. Each ring has 8 small crush ribs (nominal + 0.3 mm) for grip. One cap per nest. Caps are held around their rim by the ring or cone and kept on by the crush-rib or wedge friction.
  - PL / LPL: one front nest + one rear-cap cone. The cone (14 mm tall) wedges the cap's opening: PL 62-70 mm, LPL 72-80 mm.
  - stills: one pinch-cap socket (stepped 82 / 77 / 72 / 67 mm, each step with a groove the cap's spring clips catch in) + EF cone (56-63 mm) + E cone (51-57 mm).
  Each position is labelled in raised letters.
  Rear-cap cones are sized from mount standards (throat sizes: E 46.1, EF 54, PL 54, LPL 62) with a 6-10 mm wedge range, not from measured caps. Test-fit your caps; the script has one number per cone to adjust.
  Cart facts

  - Sticks out 10 mm (empty hanger); about 25 mm with front caps, 35-45 mm with EF/E rear caps, up to about 62 mm with a deep PL rubber rear cap from the cart side
  - Hangs 133.0 mm below the deck
  - Flat cart side needed below the lip: at least the top 40 mm. The rest of the board can hang over open shelf space; just keep it clear of the shelf below
  Retention: held by gravity unless you fit the M5 thumbscrew. A short M5 heat-set insert (6.4 mm hole, 9 deep) goes into the deck-side face of the inner flange; a nylon-tipped M5 thumbscrew through it clamps the lip, so the part cannot lift off on a bump or a lift-gate drop, slide along the lip or rattle. Check your lip is at least 16 mm tall first. Two M5 insert holes (61 mm either side of centre).
  Fits: Backstage Equipment and Magliner-style carts with a 3.4 mm upright shelf lip. The mount drops onto the lip from above: 3.7 mm slot (0.3 mm clearance), 26.6 mm deep with a round end, 0.5 mm chamfers at both slot ends.

OTHER MOUNTS
  The same holder also comes ToughBuilt bar (one piece), Dock (swap between mounts), Mountless (desk, shelf, case or screw to a panel). Pick the mount on the site: https://cart-tools.sdos-placeholder.workers.dev/#nb-hanger-lens-cap-board-hanger

TEST THE FIT FIRST
  Carts, bars and tape rolls vary a little. Before a long print, print the small fit test from the
  Test pieces section of the site (or this part at low infill) and check it on your own gear.

Not affiliated with or endorsed by Magliner, Backstage Equipment, ToughBuilt, Milwaukee, Hollyland, Eartec, Sekonic, Inovativ, Matthews or Manfrotto. Brand names only say what a holder fits.
