For 3d printing, the format between SketchUp and Gcode would be STL, have you tried if this is an option with your software?

you probably need to install a STL extension: https://extensions.sketchup.com/extension/412723d4-1f7a-4a5f-b866-281a3e223337/sketch-up-stl

There's a lot of hidden geometry in your groups...

Fredo changed the license for some of his plugins in March 2022:
https://forums.sketchup.com/t/more-fredo6-plugins-becoming-paid-extensions/191090

If you use the plugin a lot, approx. 7 USD should not be too much even for a pensioner, right? Fredo has also put a lot of work into the plugins and deserves recognition for it.

great result!

do you have length snapping activated in the preferences?

Thank you for the tip!

ThrowTo is another option too...
http://sketchucation.com/forums/viewtopic.php?p=465353#p465353

@l i am said:

Oh and Cotty you may see the special monitors have been downgraded to normal Dell monitors

Yes, but now you have to write from right to left?