Pen-Holder for MakerBeam-3D-Printer

This is a pen-clamp for my 3d-printer made out of MakerBeam-Profiles.

My 3D-printer completely build out of makerbeam-profiles. It uses only parts from the makerbeam-starterkit and some printed parts and less additional screws and other hardware.
Some pictures can be found here: https://photos.app.goo.gl/Nd8WpQus9B2oKVVz7 - some videos here: https://www.youtube.com/user/3DAndyAustria . For further information please write to 3d.andy(at)gmx.net.
I am currently working on the building-instructions and a part-list (in case you want to build this printer).
Feel free to write an e-mail :)
The shown frame will be able to hold a hot-end for 3d-printing (with heatbed), a pen for plotter-purposes or a small milling-head for CNC-milling.