How do you downsize from 800cc to 300cc, Mentor moderate plus? (Photo)

In my practice, I would likely suggest that you use the "same pocket" when downsizing.   Given your goals, adjustment of the breast implant pockets (capsulorraphy) and/or breast lifting will likely be necessary at the time of breast implant downsizing surgery.    Exactly what operation you will benefit from will depend mainly on your physical examination; specifically, factors such as the amount of redundant skin, quality of skin elasticity,  and how much you downsize will be important.  
 Generally speaking, the best online advice I can give to ladies who are considering revisionary (downsizing) breast augmentation surgery is:
1. Concentrate on choosing your plastic surgeon carefully. Concentrate on appropriate training, certification, and the ability of the plastic surgeon to achieve the results you are looking for. ***Ask to see lots of examples of his/her work.
2. Have a full discussion and communication regarding your desired goals with your plastic surgeon. This communication will be critical in determining breast implant size/type/profile will most likely help achieve your goals. 
In my practice, the use of photographs of “goal” pictures (and breasts that are too big or too small) is very helpful. I have found that the use of words such as “natral” or "significant difference” or "C or D cup" etc means different things to different people and therefore prove unhelpful.
Also, as you know, cup size varies depending on who makes the bra; therefore, discussing desired cup size may also be inaccurate. 
3. Once you feel you have communicated your goals clearly, allow your chosen plastic surgeon to work with you in determining the best plan to achieve your goals.
I hope this helps. Best wishes. 

Lots of options and opinions so you gave to pick what makes you happy. I would offer one or 2 stage surgery. You can try to do it all in one stage which is higher risk and involves repair of capsule and possible dermal graft material which is costly. You can remove implants and perform a mastopexy then wait 3-4 months and  place new implants in a neo-subpectoral pocket. I use both depending techniques depending on the goals of the patient and their surgical history of the breast and the soft tissue and blood supply concerns based on clinical exam. Good Luck!

Your breasts are too low on the chest wall.  The technique I recommend is explantation with a breast lift using The Bellesoma Method.  The implants are removed, your breast tissue is reshaped creating upper pole fullness, elevated higher on the chest wall and more medial to increase your cleavage.  Vertical scars are avoided, nipple sensation and the ability to breast feed are maintained, if not injured during your previous surgery.  At the same time or later, fat transfers can be performed if additional volume is desired.  Implants are not lifetime devices.  Fat transfers are permanent and incorporated into the body.Best Wishes,Gary Horndeski, M.D.