Entry
#7 is a great improvement!
The sphere gives the logo more depth.
I think that the stethoscope now needs to be adjusted in a 3D way, to wrap around / together with the ball...because the stethoscope is flat as apposed to the sphere.
Also see if you can find the correct color pallet to balance the stethoscope and the sphere...maybe reverse / negative effect.
Great work, looking forward to the improvements