OpenForge Internal Corner Base

There is now an official version of this one available! Check it out here: https://staging.openforge.tools/?md5=964c62366956fd86aaeea126e9ce2f20 This is a separate base for the internal corners with the postfix #floor+s2w+internal_corner+a.1x1.openforge.stl (for example: cut-stone#floor+s2w+internal_corner+a.1x1.openforge.stl). I have simply removed 2 of the magnet holes, cut out a hole for the column and stitched it back together. Rather than having to print a floor with the column attached to it, this allows you to have a separate column, giving you additional modularity when it comes to floor/wall combinations.