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Follow the base plates now that they are two different parts - #2

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Follow the base plates now that they are two different parts#2
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@correll correll commented Aug 31, 2026

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Follow-on to #1. The docs were written when CAD/Base Top.stl and CAD/Base Bottom.stl were one file uploaded twice, and said so in a note. Jason has replaced them with Top Base.stl and Bottom Base.stl, which really are different parts, so the note comes out and everything pointing at the old names follows.

What the new files are

Thickness Volume Printed standoffs
Top Base.stl 15 mm 29.74 cm³ no
Bottom Base.stl 13 mm 21.60 cm³ yes — the four the OpenRB-150 sits on

Both carry the V2 outline with the gradual transition near the mounting tabs, so neither is a stray V1 export. Bottom Base.stl is byte-for-byte the file that used to be uploaded under both names.

Changes

  • Print table — one "Base plate ×2" row becomes two rows with their own sizes and links, and the stale note is gone.
  • Renderstop-base.png and bottom-base.png replace base-top.png. The bottom plate is drawn from its reverse face on purpose: from the front the two plates are the same outline, and the standoffs are the feature that tells them apart.
  • Print volume — 150 cm³ for the set, not 140.
  • BOM — the two plate rows repriced to $1.49 and $1.08, total to $455.63. The table prices printed parts at solid volume × $0.05, which reproduces every row of the V1 table to the cent, so these follow from the new geometry. The old numbers had the top plate as the cheaper of the two; it is now the larger.

Not changed, but worth knowing

Under that same formula the other V2 printed rows do not match their STLs: crank $0.52 against $0.64, rocker $0.38 against $0.47, finger $2.20 against $3.38 (V4) or $2.86 (V3), camera protector $0.36 against $0.42. That predates this upload and those parts did not change here, so I left them alone rather than quietly rewriting them. Say the word and it is a two-minute follow-up.

🤖 Generated with Claude Code

The docs were written when CAD/Base Top.stl and CAD/Base Bottom.stl were one
file uploaded twice, and said so. Jason has replaced them with Top Base.stl
and Bottom Base.stl, which really are different parts, so the note comes out
and everything that pointed at the old names follows.

- The plates are no longer one row printed twice: top is 133 x 83 x 15 mm and
  plain, bottom is 13 mm and carries the four printed standoffs the OpenRB-150
  sits on. The bottom one is rendered from its reverse face, because that is
  the feature that tells the two apart — seen from the front they are the same
  outline.
- Print volume for the set is 150 cm3 rather than 140.
- BOM: the two plate rows repriced. The table's printed parts are solid volume
  x $0.05, which reproduces every row of the V1 table to the cent, so the new
  plates come to $1.49 and $1.08 — the top plate is the larger of the two now,
  which the old numbers had the other way round. Total follows.

The other V2 printed rows do not match their STLs under that same formula
(crank $0.52 against $0.64, finger $2.20 against $3.38, camera protector $0.36
against $0.42). That predates this upload and those parts did not change here,
so they are left alone rather than quietly rewritten.
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