BT engineering-review mesh source notices

This non-commercial review contains tessellated display assets, not fabrication
files or a manufacturing release. Native CAD, KiCad, STEP and Gerber files are
not included. Nominal geometry is not proof of real assembly or tolerances.

The enclosure and paired lamp assembly descend from the BP/BQ/BR/BS local
engineering chain. BT changes the left and right lamp surface geometry and only
the matching local upper-housing light passages/background. The left four seams
and center square form one optic; the right center hexagon forms one optic.
Segmented metal retention, adhesion and light uniformity remain unapproved.

EC60 main-board body basis
Source: https://github.com/4pplet/EC60
Commit: b9c04625bb9944f6fb806aa571da8592cdff8565
Copyright (c) 2022 Cipulot. MIT License; see EC60-LICENSE.txt.
The displayed 1.59 mm board body is a source-bound fit proxy without populated
components.

Topre plate basis
The 1.2 mm ordinary-Topre plate is a local trial using community-reference 1u
and 2u opening dimensions. Its two 7u stabilizer-side reference outlines retain
the Cipulot EC60X Plate Maker provenance and CC BY-NC-SA 4.0 notice supplied in
Cipulot-EC60X-CC-BY-NC-SA-4.0.txt. It is not an OEM tolerance drawing and has
not been physically fitted.

ai03 UDB-C4
See UDB-C4-LICENSE.txt and the retained upstream copyright notice.

All source components and adaptations are provided without warranties.