I didn't receive the piece that is pictured in Step 5 in the Orion Ball Joint Arm kit that we purchased, if that's what you're referencing as the "platform." I did receive a new molded plastic platform, which is necessary to attach the nylon ball connectors, and which fits the existing hot end mount. I would call the white laser-cut piece pictured a "top mount," or something similar, as the black molded plastic piece is already called a platform, and it is performing the function of a platform, which the piece pictured isn't, really. I do like the shape of the one pictured better than the existing one and would love to have a CAD file, as I don't know that I care enough about it to justify drawing it up so I could laser cut one of them.
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