Book Trimmer Press Attachments

I made a Book Trimmer - Bookbinding Plough to help me cleanly trim the edges of books. This works pretty well with my book press, but I was frustrated by two things:I was tired of trying to position a cutting matte behind the book while trying to keep the book aligned and closing the press.It was easy to accidentally tilt the plough as I was sliding it across paper.To solve this, I modeled two press attachments:Plate/Platen attachment to stick up slightly and act as a cutting matteBase attachment to support the ploughNow obviously not all presses will have the same dimensions, so I modeled this is in OpenSCAD. This means you can click the “Customize” button and use measurements for your own press. For those who are adventurous, I also included a build123d python file if you want to use it instead.Tips:I recommend your first version be printed with the Platen Length set to 5mm or so to test fit on your press. Then do the rest.(Press specific) The Inner Grip Length should reach down to t