Could a Breast Implant Valve Migrate from Under Nipple and Feel Like a Lump?

I agree with my colleagues that the implants are not likely a cause of your shoulder problem. However, a pectoralis muscle that is bound up by a capsular contracture can give you the sensation of tightness and pulling.

Slow leaks are possible but unlikely to be bilateral. We know that with time the ribs are remodeled by the constant pressure of the implant on the chest wall whch may account for loss of projection that you are observing.

No one knows for sure but the hypothesis is that it comes from the air when implants are placed or filled and therefore closed systems are recommended to decrease this potential source

I'm sorry to hear about your experience. Payment policies are different for each surgeon, so you would have to ask your surgeon about the specific costs related to your revision surgery. You may be offered a discount that can be covered by financing. 

A  C cup will vary on a 32 versus a 40 chest and so there is no definitve answer for this. Typically, going up a size in cup will vary from 150-200cc but this is only an estimate. Commonly speaking, on average it takes about a 350cc implant to take the average A cup to a C cup. However, I...

If this is what you seek, it is likely you will require an agressive reduction followed by staged large subglandular (over the muscle silicone implants). Be prepared for scars/