Tablet / Smartphone universal wall mount

UPDATE 19-09-2020:
I found a problem in the right piece with the pen holder. A few days ago I knocked it, the pen fell off, and broke. So I changed the model a bit in order to prevent this from appening. Now the pen holder has a place where the pen can fit without falling from one of the sides. I also included only this new part for those who already printed it. You just need to print this piece, and use a bit of superglue.

I needed some desk holder for my Huion 420 graphic tablet (or drawing tablet, idk how it is called ahahah), so I designed one. During the modeling I tought about making this to fit any tablet or smartphone size, so I split it in half in order to make it universal.
The holders have a drowing pen holder on the right side, the hole on top is 16.5mm in diameter so it can hold any pen with a maximum diameter of 16.5, and it also have a little hole at the bottom for the pen tip.. On the left side it have a little hook to put the cables. I didn't made it too high in order to follow the lines of the holder.
The measurements of the holder are the following: the part inside is 10mm wide, so you can put inside it a tablet or a smartphone with this size. It is 44mm long and 75mm tall. Each side have 2 holes for screews, with a diamiter of 2.8mm and a little chamfer on top to put larger head screws.
I also include 2 models without the cable hook and the pen holder if you don't need them to hold your smartphone and tablets. I didn't put any cable holes in it, like for charging or connecting the audio jack, because every phone or tablet have the connector in a different place so it would be impossible. But you can drill a little hole where you have it in order to charge it or listen to the music while docked.
I attached it on my desk, but you can use it on a wall as well, just pre-drill the holes for the screws and then place it on the wall and enjoy!

If you have any suggestions for upgrades, additions, or any other comments please leave the under here!

Let me know if you like it, if you print one yourself (maybe upload a photo, I'll really appreciate it!), and also consider checking the other stuff I make on my profile. I'm still learning how to model things, but I have lots of ideas and I'll upload them soon!
If you also want to make a tip to me, I will really appreciate it, and I'll think about continue making this stuffs 'cause I will know that someone likes my design!