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a couple thoughts came to mind.

the inner diameter of the sphere is the target diameter.
so i added twice the wall thickness to the diameter of the first sphere.

also, if a 25mm long neck is...

reminds me of the bombs in the game stratego and of course these two instruments

balifon
6214

timbila with an unseen necked sound hole and a membrane covered trumpet

6215

tanx eh?

howdy folks,

sorry for the delay in responding. thank you for everyone's input.

thank you, curious aardvark, for your suggestions. i was about to post where i had gotten to when i saw your post...

hey roxy,
this is fun. i like entering code to get models or a mesh i guess. new to all this. the openscad user manual seems well written. this is making sense.
i played with the code you gave me...

thank you for this. i've used sketchup a little. mostly because it seemed it might be easier to learn then others.
i appreciate the input

thank you very much. i will get my head around it. much appreciated.

thank you for your response.

i think i did not describe adequately what i want to do.

i need hollow spheres with a round hole in the wall.

to be used as resonators.

is it possible to print one piece spheres with a hole of a specific size?

thank you