I am unsure of how much of the cavity is inside and outside. I was quite clear before surgery that I didn't want to lose any length, if possible. However, I trust the doc and the BS rep who was there that they sized it appropriately. I would guess I don't have as much "inside" as the average.
I would rather have a fully functioning woody with no issues than a long boner that otherwise gives me problems! And all signs point to the former, so that's good.
That being said, I believe I am on the path to coming close to my pre-op length and girth. My pre-op erect length was 6 3/4 and girth was just short of 6. As I said, my measurement this week from the top, but not the middle because of the reservoir and tubing, is about 6 1/4 length and about 5 1/2 girth. I noticeably see difference from my earlier measurements, so I'm happy that cycling is making a difference. And let's be honest; if I get to 6 1/2, is it really noticeable from 6 3/4? I don't think so.
I don't want to say who did it, as I am very happy with my uro and don't want to imply any negativity here or blow my cover.

Although he is not one of the big names, he is a respected and experienced uro.
ED worsened over 25 years, likely VL. Went through pills and injections, and results faded over time. Implant AMS 700CX, 21 cm, no RTE, on 6/3/24.