I'm currently 6.5x6. My goal is to get to 8.5x6.5 in a 2 year period. Is it realistic to think that I can gain 2 inches in length and .5 in girth in that time period? I want to know, so that I can possibly avoid any disappointment. I would really love to be 8.5 inches, but I'd be happy to settle with 7.5. Thanks.