MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.

Download Now

Report as inappropriate

I do not put a spacer in the middle and I haven't heard of anyone seeing any positive results when doing so vs. not. The most important thing is having both sides of equal height with the keys. A spacer on one side to make it even may be needed - which a simple washer will do fine with.

There are many ways to engrave your moms name into the key holder. Try tinkercad.com and just upload the stl files. I do not give out original files of the design for many reasons. Fusion 360 can cut into the stl file using patch mode but I have not tried that with stl files.