Fidget Stick Easy to print

The fidget stick it's a remix from https://www.thingiverse.com/thing:2338550 ( The Fidget Stick by zapta)
Because the side walls were too thin and fragile to the pressure, I created a smaller cavity (oval shaped).
The fidget was printed with wood pla , 100% infill, 2mm walls. It takes approximately 3 1/2 hours to print (60 speed).
After printing it was sanded a bit to be smoother and coated with acrylic transparent spray paint.
After painting, I prepared a piece of cooking nonstick paper in