Compatible Bracket for Rackmate TT

No 'issue' but I have the Deskpi Rackmate TT and need some clarity on the approach before I contribute any files

The bracket is 170x89(2U) with 2 standard labstack openings but as you can see there is not enough room for a 3rd bay so I made a smaller (half labstack? its 20.666mm wide) so the questions are.

- Is it useful to keep the smaller opening for shenanigans?
- If its best to only have 2 openings should they be equal distance from the side and each other or should they be in the middle as close together as the other brackets have it?
- Am I missing a trick to make this space even more useful?

未指定原始檔案、測試或進入點；先與 maintainer 釐清預期的 Rackmate TT bracket 設計。由於開口配置和較小開口的實用性仍未確定，因此貢獻尚未定義為完成。

由索引模型根據 Issue 內容生成。