Trash Bag Horns + Bag Pocket - Backstage cart lip (one piece, strongest)
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What it holds: Trash/grocery bag handle, short horn (mouth about 35 mm)

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_MC_bag_horn.stl  (supports: no)
  - clip_MC_bag_horn_long.stl  (supports: no)
  - clip_MC_bag_horn_pocket_left.stl  (supports: no)
  - clip_MC_bag_horn_pocket_right.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: one piece with the Backstage/Magliner cart-lip mount, strongest. Prints standing on its end face, no supports; M5 heat-set insert + thumbscrew lock on the lip. Two horns per bag: short horns as standard, long horns for drawstring bags, or a pocket horn at one or both ends to keep spare bags.

HOW IT WORKS
  A trash bag on the cart, held OPEN so you can drop gel offcuts, tape backing, battery wrappers and cups straight in, and keep the camera cart top clean.
  How it works
  Two clips, each with one horn, slide along the lip to suit the bag: about 250 mm apart for a grocery (T-shirt) bag, 300-400 mm for a small kitchen or drawstring bag. Hang one handle loop (or drawstring loop) on each horn. Each horn runs out from the cart and rises slightly, so the front and back of each handle sit at the root and at the knob, and the mouth stays open as wide as the horns are apart. A no-handle bag works too: fold the mouth over both horns.
  Two lengths. The standard horns are short for doorways: the tip is only 58 mm from the cart side and the mouth opens about 35 mm front to back. The long plain horn reaches 79 mm and opens the mouth about 65 mm, for a cart that stays put at crafty or video village. Print two long horns, or a short pair (plain + pocket).
  On a moving cart: each horn ends in an 11 mm knob, and the rise sends the loops back toward the root, so a bumpy push or a lift-gate drop does not shake the bag off. The horn tops are rounded so thin handles do not tear. The horns sit at deck level, up to 35 mm above it and below the 42 mm block top.
  Spare-bag pocket
  The pocket version adds a pocket on its outer side (away from the bag), 30 x 54 mm inside and 86 mm deep, for 8-12 folded grocery bags or a small roll of liners. A V notch in the front lets you pinch the next bag out. Two drains are in the floor. The body is cut away under the horn, so the handle loop drops right to the horn root as it does on the plain horn. It comes in right and left versions so the pocket is always outboard.
  Numbers

  - Short horns (plain and pocket) stick out 58 mm from the cart side (the pocket itself only 41 mm); the long horn 79 mm
  - Hang below the deck: plain horn 45 mm (the back plate), pocket horn 93 mm
  - Needs 45 mm of flat cart side below the lip for the back plate. Below that, the pocket stands 4 mm off the cart
  - Plain horn 76 x 40 x 87 mm, pocket horn 76 x 82 x 135 mm (out x along the cart x tall)

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/#mc-bag-horn

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.
