Replacement bottom part for PicoCalc

This is a modified version of the bottom part for "PicoCalc"
- PicoCalc :
https://www.clockworkpi.com/picocalc

The original data can be downloaded from
- PicoCalc 3D models in OBJ & STEP format :
https://www.clockworkpi.com/product-page/picocalc-3d-models-in-obj-step-format-free

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- STEP file
x B4004.stp ---> B4006.stp
- STL files
x btm4004.stl ---> BTM4006.stl ...Bottom part
x B04PCO.stl ---> B05PCO.stl ... for Raspberry Pi PICO
x B04LYR.stl ---> B05LYR.stl ... for Luckfox Lyra
x B04LYU.stl ---> B05LYU.stl , x B04LUC.stl ---> B05LUC.stl ... for Luckfox Lyra + USB_A breakout board
( USB_A breakout board ... Akizuki denshi [AE-USB-A-DIP] https://akizukidenshi.com/catalog/g/g107429/ )
x B04LYP.stl ---> B05LYP.stl , B04LYC.stl ... for Luckfox Lyra PLUS
x B04ESP.stlvB05ESP.stl ... for ESP32-S3-PICO
x B04xxx.stl ---> B05XXXX

Microcomputer board removal tool
- STEP file
twz01.stp
- STL file
twz01.stl

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This stand is designed for PicoCalc units that have been modified wi