Grip Head Tree - Backstage cart lip (one piece, strongest)
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What it holds: Two 2-1/2 in grip heads on M5 posts (~102 mm out with heads)

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_FA_grip_head_tree.stl  (supports: no)
  - clip_FA_grip_head_tree_post.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: One piece with the native Magliner / cart-lip mount (the shipped part) + 2 separate posts. Prints on its end, posts standing, no supports.

HOW IT WORKS
  Parks 2 grip heads (2-1/2 in) on the side of the cart, below the shelf edge. Each head drops onto a 15 mm post through its 5/8 in hole. Fit each head pointing straight out from the cart, with its T-handle pointing toward the nearer end of the tree (never toward the other head), and tighten the T-handle so it locks on the post. Even untightened, a head has to lift 50 mm to come off. The posts are 100 mm apart and their centres sit 20 mm out from the plate face, so with the heads straight out the discs clear the cart by about 8 mm and each other by about 35 mm. A loose head can swing and knock into the other head; tighten it.
  Test-fit first: this part was designed from typical 2-1/2 in grip head sizes (5/8 in hole about 20 mm off the disc centre, 64 mm discs), not from a measured head. Try one of your heads on the printed posts before you trust it on a moving cart.
  The posts print separately, standing up, so they come out round and strong with no supports. Each post seats in a 45 deg countersink in the ledge. An M5 x 12 screw and an M5 washer (15-20 mm OD) pull it down from underneath, into an M5 heat-set insert in the post. The washer seats on a flat underside.
  On the cart: the tree sticks out 50 mm from the cart side, and about 105 mm with heads fitted straight out. It hangs 90 mm below the deck and needs 90 mm of flat cart side below the lip for the back plate to bear on. It is 130 mm long, plus the T-handles past each end. A fitted head's discs come up to about deck level (estimate, check with your heads), outboard of the cart edge.
  Retention: held by gravity unless you fit the M5 thumbscrew. Press a short M5 heat-set insert (6.4 mm bore) into the hole on the deck-side face of the clip, then fit a nylon-tipped M5 thumbscrew. It clamps the cart lip so the part cannot lift off on a snag, slide along the lip or rattle. The screw sits 13 mm above the deck, so your cart's lip needs to be at least 16 mm tall.
  Fits: Backstage Equipment and Magliner-style carts with a 3.4 mm shelf lip. It drops on from above: a 3.7 mm slot (0.3 mm clearance), 26.6 mm deep with a rounded end and chamfered 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/#fa-grip-head-tree

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.
