This is a simple bracket to join together IKEA Lack tables. It is printable with no supports and 0.3mm layer height with 20% infill is fine.

Included 2 x countersunk holes to enable screwing to the legs of the upper table in the stack with 8g screws, and then the bracket and table just sits on top of the lower table. 

The bracket file includes an easily removable internal brim to help bed adhesion and easily tears out.

This may be similar to other LACK table brackets, but this is my own design version

Note: I plan to release the files for the Lack enclosure shown in the photo soon. This is an extended height version of the Prusa Lack enclosure, but is high enough to have spools mounted inside the enclosure above the printer, AND is is sculpted around the PSU so the PSU is outside of the enclosure without having to remove it.