Girth increase w/ Length

I am currently 6.5in Length, 5.2in girth. I want to be 8.5x6. Is this possible to achieve by only using the autoextender? I plan on using it for 6 hours per day full force. 2 hr at a time

I've found the best and easiest gains with a lot of jelqing

Make it the core exercise you do, and kegels.

You MIGHT get to 5.5 without doing any manual girth exercises. I'd recommend doing jelqing and variations of that exercise, along with compression squeezes (Horse 440s) after a month or so of jelqing to help adding girth. Don't start clamping until at least 6 months of doing manual girth exercises.