Thanks for the report!
Honestly, your length is certifiably long, and with that usually means "more product to attain more
Girth." In other words, 10cc of filler is going to look fatter on a 5inch penis vs a 7inch penis. Plus your immediate gains were also likely due to swelling, which is pretty commonplace with any filler.
I also suspect the filler will better integrate with your tissue over time, improving in "feel." There was definitely a difference in the way my penis felt immediately after my first round and how it feels now that there is more integration over time. I suspect this could be the case for you, but time will tell.
If I were you I'd give it a test drive to gauge it. How it performs is most important, contour & such may not be nearly as important if you're getting good reactions. I think you can achieve 6inch in
Girth and be mostly alright with respect to "its feel" given your longer than average length.
My unit has so much filler that it feels like a thick rubber sheath under my skin - I always used to wonder if it would present any problems and I can tell you that partners simply don't notice, especially when they're getting filled up.