Spray Bottle Hanger with Snap Gate - Backstage cart lip (one piece, strongest)
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What it holds: 1 trigger spray bottle, 28/400 neck, plus a microfibre pinch slot

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_LA_28_1up_spray_hanger_28_1up.stl  (supports: no)
  - clip_LA_24_1up_spray_hanger_24_1up.stl  (supports: no)
  - clip_LA_24_2up_spray_hanger_24_2up.stl  (supports: no)
  - clip_LA_28_2up_spray_hanger_28_2up.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 Magliner/cart lip block (shipped part), strongest. Prints upside down on its top face, no supports; optional M5 thumbscrew lock. Also included: other sizes and parts (clip_LA_24_1up_spray_hanger_24_1up.stl, clip_LA_24_2up_spray_hanger_24_2up.stl, clip_LA_28_2up_spray_hanger_28_2up.stl).

HOW IT WORKS
  Hangs a trigger spray bottle (water mister, dulling spray, Streaks 'N Tips, IPA, lens or monitor cleaner, bug spray) by the neck, so it can't tip over or roll around the cart top. The bottle hangs with the trigger facing out and its body resting on the back plate.
  Snap gate: the fork mouth has two flex arms with round nubs. Push the neck in and it clicks past them into a round seat. The closure above and the bottle's shoulder below trap it top and bottom, so it cannot hop out over a door threshold or on a lift-gate drop. The seat is only 0.8-1.3 mm bigger than the neck, so it doesn't rattle. To take it, pull it straight out toward you with one hand: each arm flexes about 1.2-1.4 mm and lets go. The click force is roughly 2 kg (18-19 N, a beam estimate): easy one-handed, but well above what a bump can do.
  Two neck sizes. The hanger grips the bare neck just under the closure skirt (the thread root, called "E" in the bottle trade), not the threads. Unscrew the sprayer and measure across the bottom of the threads, or measure the plain neck right under where the closure sits:

  - 28 for the common 28/400 trigger sprayer on 16-32 oz bottles: fits necks of 24.5-25.5 mm (the 28/400 spec E is 24.7-25.2). Seat 26.0 mm, mouth 22.4 mm at the nubs. The closure must be wider than 27 mm (most are 34-36).
  - 24 for 24/410 mini triggers on 8-16 oz bottles: fits necks of 21-22 mm (the 24/410 spec E is 21.3-21.7). Seat 22.5 mm, mouth 19.0 mm. The closure must be wider than 23.5 mm.
  - Bare neck needed: the yoke is only 3 mm thick around the seat and arms (5 mm at the root by the cart, where it needs the strength), with a 1 mm chamfer under the seat for the shoulder curve. So the bottle needs about 3.5 mm of plain neck between the bottom of the closure skirt and where the shoulder starts. Check your bottles first: on some, the closure skirt comes right down to the shoulder, and those won't fit.
  Versions: 1-up (with a microfibre pinch slot beside it: push a cloth corner into the wide end and slide it to the narrow end) and 2-up (100 mm pitch for 28, 80 mm for 24).
  Cart facts

  - Sticks out from the cart side: 72 mm (28) / 62 mm (24) for the part. The bottle sticks out further: a 90 mm round 32 oz body reaches about 93 mm out and the trigger nozzle about 115-120 mm. Use a cart end or a side that doesn't brush doorways.
  - Hangs below the deck: 50 mm (the part). The bottle itself hangs to about 150-220 mm below the deck.
  - Flat cart side needed below the lip: 50 mm
  - Yoke top is level with the mount top, 42 mm above the deck, so the trigger head sits above the deck edge where you can grab it.
  - Inserts: one M5 on the 1-up, two on the 2-up (at each bottle)
  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, slide along the lip or rattle. Check your lip is at least 16 mm tall first.
  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/#la-28-1up-spray-hanger-28-1up

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.
