well I looked at the images and I am not sure what you are trying to do. Part B is really dense and smoothing it is going to make it 16 times denser!
I will have to take a longer look at the shape and get back but I would say start by rethinking the topology of part B because quite frankly it it way to dense.
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675