On the external surfaces of this penholder is possible to use the original lego_blocks to personalize it!

To have a correct coupling between lego_bricks and the printed model without using supports, I strongly suggest to use the test print, to evaluate the correct dimensions of the pins. I printed mine in Bambu PLA CF using lego_penholder_2 file and everithing fits perfectly.

A good alternative, but with a lot of wasted material, is to print lego_penholder_0 plate using supports.

Enjoy :)