Cart First-Aid Kit Cradle + Pull-One Bandage Slot (Wide) - Backstage cart lip (one piece, strongest)
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What it holds: A standard visible spot for a first-aid kit of any length, strapped in, with a side magazine that hands out one bandage at a time without opening the kit.

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
  - H_QK_firstaid_wide_lip.stl  (supports: no (unless your slicer warns))
  - QK_lid_wide.stl  (supports: no)
      how it lies on the plate: top face down, skirts up, no supports
  - QK_follower_wide.stl  (supports: no)
      how it lies on the plate: flat, cross up, no supports

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: Strongest: one piece with the Magliner / cart-lip block, the holder joined to it across its full width. Sits at the same height as the docked version. Fit the M5 heat-set insert(s) + thumbscrew. Prints upright, floor down; use build-plate-only supports under the 14 mm deck-side flange of the lip block only. Magazine lid and follower plate are the same as the other versions.

HOW IT WORKS
  Takes a store-bought kit of any length, up to 68 mm thick (AMK .5, small hard cases), and up to 155 mm tall. The kit sits on a ledge with a front lip, against the cheek beside the magazine; the other end of the bay is open, so a long kit just runs past it. A 25 mm hook-and-loop strap loops through two slots in the back plate and around the kit, so it fits any length, and you peel it open with one hand.
  The side magazine holds Tough Strips 1 x 3.25 in (wrappers up to 44 x 109 mm). Push the bottom strip forward through the finger window and it slides out onto the tray: one at a time, without opening (and dirtying) the kit. The pull slot is 3.7 mm tall with a 1.2 mm stop ridge, so one wrapper passes and two jam. A follower plate keeps the stack flat; its two sprung side leaves stop it rattling on a moving cart. A snap-hinge rain lid covers the top. The raised crosses mark it from across the set: paint them green with the AMS. Use a green or white cross; the red cross emblem is protected. Floor drains in both bays.
  Measure your kit before printing: kit sizes are from retail listings and vary by seller. The bay takes any length; check the thickness (std / wide 68, deep 103) and height (155). Bench-test the pull slot with your own wrappers: if two come out together, add a strip of tape to the slot roof.
  Mount (DOCK, twin): this holder is wider than 120 mm, so it has two DOCK tongues 60 mm apart (SYSTEM_SPEC twin pattern). Use two adapters set 60 mm apart with the spacing gauge (DOCK_spacing_gauge_60): two cart-lip adapters A_MLN_lip (3.4 mm Magliner / Backstage shelf lip), ToughBuilt bar adapters or round-tube adapters. It drops in from above and both latches click. To lift it out, press the left latch pad, then the right, then lift. Print the DOCK coupon first to choose the fit. The M5 x 25 lock screw is required: fit it in the right-hand adapter only (the left boss stays empty so the neighbour clears).
  Cart facts (on two A_MLN_lip adapters, 60 mm apart)

  - Sticks out 146 mm from the cart side
  - Hangs 125 mm below the deck; holder top 34 mm above the deck
  - Overall 138 x 232 x 159 mm
  Hardware: M5 lock screw (above); 25 mm hook-and-loop strap, about 600 mm (longer for long kits).

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/#qk-firstaid-wide

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.
