Here is a link that discusses stacking


New Member
And here is a link for the old version (1.6) of 123d make. Autodesk has completely done away with 123d and absorbed it into fusion360 and tinkercad. I can do without the cloud based stuff for now, and 123d runs on xp still...

Autodesk 123D Make


New Member
Last post for me on this subject.

Blender as a whole is difficult, but if you can use it for just one thing and become proficient, it is an extremely useful tool as it is available on windows, mac, and linux flavors. Additionally, those benevolent souls out there who make extremely useful scripts as add-ons, have made it even easier to attain our goals. Below is a tutorial on using add-on.

Blender Tutorial: Blender 3D printing tutorial
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