Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:100588.
This new puzzle was published on Puzzle Will Be Played earlier this year. Six identical pieces can be combined using a sequence of 9 steps to make the traditional burr puzzle shape.
Initially, I overlooked this as a non-printable puzzle but yesterday I noticed that if the pieces are rotated vertically they should print perfectly well.
Copyright for this design belongs to Logan Kleinwaks so non-commercial copies only please.
If you are interested in a more challenging variant of this puzzle, Logan has just published Lynxes of Spain and Lynxes of Portugal which also look printable and reuse some of these pieces in combination with some new ones.
Update 21/03/2019 To make Six Iberian Lynxes puzzle, print 6 of Lynx_8_04_01_S1. To make Lynxes Of Spain puzzle, print 4 of Lynx_8_04_01_S1 and one each of Lynx_8_04_01_S2 and Lynx_8_04_01_S3.
Here is the solution video for Six Iberian Lynxes - https://youtu.be/u1zDb55cexo And here is a solution video for Lynxes of Spain - https://youtu.be/wtZ93uLzlDI