Solidcom C1 Crew Row - Backstage cart lip (one piece, strongest)
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What it holds: Master bay + crew bays for Hollyland Solidcom C1 headsets. Bays butt together on the lip for the right spacing, with room to swap batteries on the cart.

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
  - HB_C1_master_bay.stl  (supports: no (unless your slicer warns))
  - HB_C1_crew_bay.stl  (supports: no (unless your slicer warns))
  - HA_C1_cradle.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: Default: one piece with the Backstage/Magliner cart-lip mount, strongest. Optional M5 thumbscrew lock in the mount. Prints standing on its end. Print 1 master + 3 crew bays (each with a cup cradle); butted on the lip they set the spacing.

HOW IT WORKS
  The whole intercom kit on the cart: a master bay and three crew bays for Hollyland Solidcom C1 headsets, each hung by its band with its mic cup in a cradle.
  How the row works
  Each bay is 240 mm long, exactly the spacing one headset needs, so bays slid side by side on the lip until they touch give the right spacing by themselves. That leaves a 53 mm gap between one headset's mic cup and the next headset's battery door (about 42 mm past the folded boom), so you can open the door and pinch a pack out on the cart. If your fingers are big, lift the headset off to swap. Print one master bay and as many crew bays as you have remotes (three shown, 0.96 m of cart edge for four headsets).
  Master bay: MASTER is set into the mount face above the deck, so the red-nameplate headset (or the wired hub headset) always goes back in the same place. Crew bays have a flat label panel there for a name or channel.
  Every bay holds its headset the same way as the single saddle: a soft crowned band saddle with a back stop and a front nub, and an adjustable U cradle under the mic cup (fold the boom up first; it stands in the slot between the cradle's ears, so every headset is stored muted). Set one cradle to your headset with its sliders fully out, then set the others to match; the cradle holds the cup at any slider setting.
  Sizes are partly estimated. Hollyland publishes the single-ear headset's overall size (186.9 x 75.6 x 188.6 mm) but not the band, earcup or boom sizes. The cradle therefore adjusts 10 mm each way, along the cart and up and down, so you set it to your own headset once. If your headset does not sit right even at the ends of the slots, measure it (see below) and tell us; the build script takes the new numbers.
  Numbers (each bay)

  - Sticks out about 111 mm from the cart side (cradle front)
  - Hangs about 229 mm below the deck; the block tops stand 42 mm above it
  - 240 mm of cart edge per headset; two mount blocks per bay (one under the saddle, one at the far end)
  - About 333 g per bay with its cradle; 1332 g for a master + 3 crew row (PETG estimate; use your slicer's figure)
  - Each bay prints 240 mm tall on its end: check your printer's height
  - Hardware per bay: 2 M5 heat-set inserts + nylon-tipped M5 thumbscrews, 2 M4 x 10 button-head screws + 2 M4 nuts

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/#hb-c1-master-bay

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.
