3D Printing Thread

Can anyone suggest a free and easy to use tool to modify STL files? I have a simple requirement (see attached) and think I may be able to it myself by modifying an STL on Thingsverse. Any help is appreciated. Cheers.
I can try to help you with any modifications through CAD if you can share the file.
 
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I can try to help you with any modifications through CAD if you can share the file.
Thanks so much, man! Basically, id like to keep the holes in the same places just the center part cutout.

Just to clarify, i would like the output like the white frame.

STL is at the link below (couldn't attach as it's too large)

I would like the height of the frame to be 10mm please.

Thank you again!
 

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Thanks so much, man! Basically, id like to keep the holes in the same places just the center part cutout.

Just to clarify, i would like the output like the white frame.

STL is at the link below (couldn't attach as it's too large)

I would like the height of the frame to be 10mm please.

Thank you again!
Done! The file is uploaded to Thingiverse: https://www.thingiverse.com/thing:6666099. Let me know if any changes need to be made...
 
What software are you using to modify the STL file? I tried blender which does work good with mesh files but is not suitable for CAD related.

I recreated the model from scratch
in fusion 360 from the 120mm fan specifications. The geometry was pretty simple...
Let me know if you need help with modelling anything...
 
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