Rain-Proof Dry Box 4x2 (gasket, clear lid) - Backstage cart lip (one piece, strongest)
======================================================================

What it holds: A gasketed clear-lid box on the cart for your phone, keys, wallet and fob when the rain hits. Two snap latches, solid back, drip skirt.

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
  - case_CJ_drybox_4x2_base_lip.stl  (supports: no (unless your slicer warns))
  - case_CJ_drybox_4x2_lid_clear.stl  (supports: no (unless your slicer warns))
  - case_CJ_drybox_gasket_TPU.stl  (supports: no (unless your slicer warns))
  - case_CJ_drybox_label_card.stl  (supports: no (unless your slicer warns))
  - case_CL_drybox_pad_TPU_4x2.stl  (supports: no (unless your slicer warns))

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: One piece with the Magliner/cart lip mount, strongest. Prints upright on one flat face (case bottom + mount bottom), no supports. Optional: M5 heat-set insert(s) from the deck side + M5 x 20 nylon-tip thumbscrew stop lift-off.

HOW IT WORKS
  When a downpour hits, your phone, keys, wallet and truck fob need a dry place that is right there on the cart. This box seals with a 3 mm foam cord (or a printed TPU fin gasket) that runs right round inside the hinge.
  Numbers

  - Inside: 168.5 x 84.5, 42 mm deep (35 mm above the TPU pad). Takes a phone up to about 166 x 82 in a slim or standard case (rugged Otterbox-type cases do not fit), plus a wallet and a key fob.
  - Outside: 107.5 deep x 181.7 wide x 45 tall. The lid top lines up with the clear-lid cases on the same cart.
  - Seal: 2.4 x 2.3 groove. 3 mm closed-cell foam cord is the primary seal. The printed TPU option press-fits the groove and has one thin 30 deg leaning fin, 0.3 proud, that bends rather than crushes, so it seals at light latch force.
  - Three square-tooth snap latches (centre and both ends), so the clear lid cannot bow. Upward load pulls the tooth straight against the square ridge, so they cannot cam open on bumps. Thumb the tabs to open.
  - Snap-on clip hinge. The lid opens to 98 deg and rests past vertical. Solid back, drip skirt, front label slot (DRY BOX card included).
  - Twin DOCK tongues (60 mm pitch): two adapters on any carrier
  - Filament (estimated): base 240 g, clear lid 46 g, TPU gasket 2 g (optional), card 2 g
  Rain- and splash-proof, not submersible. Test yours under a shower first.
  Drop-in floor compatible with Gridfinity (Gridfinity by Zack Freedman, MIT licence): standard bins, our insert set and community bins all drop into the slots. The optional CL TPU pad lines the floor.

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/#case-cj-drybox-4x2-base

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.
