Once again back at frogs. :) "Frog_chess.stl" was printed with 0.2 nozzle at 0.1 layer height this model is better (larger figures, heads and aligment of them is better). The file ending "04" i tried and printed succesfully with 0.4 nozzle at 0.2 layer height (worser). Default is 20*20 square under each frog for good fitment on small travel chess boards. No supports needed