Sea Turtles

There are 2 models a large and a small. The ball on the back of both is 7/16 rad and is .380" in height. I use radius gages to measure the shells I find and then scale the models to fit the shells.  for instance 7/16 = .4375" so if a she would best fit a 9/32 rad (.28125") the I scale it 63% to get .2756 close enough or for a ½ rad I scale it 113% to get .4944. I then just hot glue the shells to the backs. I made them in PLA & PETg just for more colors