06/14/2022 Updated：
Upload new version for 3030 profiles.
Have a try!
Someone said this one might doesn't work, but he tried 4040 25% scaled smaller can fits perfect for 3030.

The same day updated: New parts for 2020 aluminum profile.

If you find it loose when fixing it into the profile, just scale a little in the slicer software.

Sometimes when you want to attach stuff to the aluminum profile, you must disassemble the whole structure. It's really miserable :(

Now we have this, just 4 parts can be easily printed without support, just download and follow the diagram pictures and try. You can also use your own parts to replace the "Clip_holder" part.

The files uploaded are for "4040" aluminum profile, I will make a new one for "2020" later.

Welcome to upload your specific holder parts in remixes. Enjoy!

See my other designs at:
https://www.thingiverse.com/wuguigui/designs