Open Press lower-roller sections, fixes

We were printing the open press project and noticed various parts of the press were not laid down flat, So we rotated them (Easy enough in most printing applications, however we had one that wouldnt snap at 90 Degrees).

We also suffered a lot of issues getting the lower roller to print with or without supports, and when it did print getting the square axle/pin in was very difficult. We sliced the part into several pieces that lets you assemble and replace it piece by piece, and you don't need any supports etc.