Sweet Spot Calculations

Is there a calculation to project your fill volume to meet your sweet spot?

I ask this question, because two visits prior to my most recent visit to my surgeon's ofice, he shared with me that my sweet spot would be somewhere between 8 and 9 cc's in my 11 cc band.  Even though he said this, he still proceeded with my incremental fills and it wasn't till my recent fill (number 6), that I had actually reached that desirable level.

I am exactly at 8.5 cc's and I am there!  By my calculations, that is a 77% restriction in my 11 cc band.

So, how did he know where my sweet spot would be so many months before I actually reached this fill volume? 

Is there a secret % restriction calculation range that projects at which volume we would fully realize a good point to be (not too loose, not too tight)?

In looking through some of your posts, I see that there are 5cc bands, 10 cc bands and 11 cc bands.  And it looks like some of you have hit your sweet spot at 55%, some at 60 % and me at 77% restriction of our band.

I am really curious to understand what drives these differences in % restriction.. yet more so, as to understand how my surgeon knew I would be there between 8 and 9 cc's. 

I really like to reference scientific publications, but could not find one ... but did find this blurb on wiki..(not a  good source.. but interesting)

No accurate number of adjustments required can be given. However, an average may be estimated to be between three and five fills (where saline/isotonic solution is inserted into the band via the subcutaneous port) for a person to reach the optimal restriction for weight loss. The amount of saline/isotonic solution needed in the band varies from patient to patient. There are a small number of people who find they do not need a fill at all and have sufficient restriction immediately following surgery. Others may need significant adjustments to the maximum the band is able to hold. Bands come in several diameters and sizes and can hold a total of between 4 cc (ml) to 12 cc (ml) of fill fluid depending on the design. Band size is usually determined by personal preference of the surgeon who places the band together with what s/he is either able to use (e.g., specific bands approved in country of surgery) or what s/he believes to be the most appropriate. In Europe, for example, it is possible for the surgeon to use many designs. The size of the band used is determined by the surgeon during surgery based on the size and thickness of the patient's stomach

HENCE.. I must be a little thick around the stomach!!

The good news for me is that this most recent fill is finely working for me.
My uptick in physical activity hasn't hurt this adventure, but I truly feel that this fill is where I want to be..and I hope it lasts for several months to come..