Hi there.
It took me 10 months, 1.000 hours. I was wearing the extender 6 hours per day, a very few times even 8 hours, 5 days a week. With 1 min breaks every 30 min. At some point I took a 1 month break, at another point I had a break for 1 or 2 weeks.
Flaccid is significantly longer, maybe 1"...