Monitor Pen Tray Remix

Really nice, simple and handy tray project by berky93. I just added a hole in the middle as I found it was quite cumbersome to pick up my graphics tablet pen from it. Now you have ample room to just grab it through the middle.

Also shortened the thickness of the base to 1mm instead of 2mm, imho no need to waste filament and time on that part as it has enough strength to hold a pen either way. Length increased to 17cm to fit my pen, but you can rescale it in the slicer if needed.