Some minor software tweaks that might be useful#39

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drdpj wants to merge 4 commits intosimoninns:mainfrom

Commits on Feb 4, 2025

Make hole in eye surrounds a bit bigger, rejig battery to take bullet connectors from amazon. Fixed bug in robot build stl build script.
drdpj
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Commits on Feb 5, 2025

Updated STLs
drdpj
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Commits on Feb 6, 2025

Shaved a wee bit off the outside of the pen holder so it moves more easily.
drdpj
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Commits on Feb 7, 2025

1) Trap barfing commands, at least try and deal with exceptions gracefully - not enough info recorded at the moment, that needs work
drdpj
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