Ya be careful, streching too much is like using a vacuum and will rupture your blood vessels and might create a clot or a bend... So make sure you do it in a shower to first warmup and then don't forget to cool down. I personally tried it but I really didn't have enough time doing it everyday just to gain 1/4 IN in a year so ya I gave up. Your 6.5 that's like a little over average, most women perfer 6-7 accordin to Mr. Polls so why u wanna change it? Well the decision is up to you but it's more skillz than equipment.