I'd go for it. What is the most negative thing that could happen? But I'm an advocate for sometimes picking a goal that you think is slightly out of your reach just to show that you're still capable of growth. The last few months I've been thinking a great deal about the things in my life that I wished I had "gone of it" but didn't. You can't get those back. IMHO too many people are afraid of failure. I think it's important to "know you limits, and then try to stretch them. That means at times you are going to come short of your goals, but so what? You gave it a shot. If I didn't think this way, I would never have married the wonderful woman I share my life with and who is the mother of my two sons; I never would have completed graduate school; I never would have earned a third degree black belt in Shotokan Karate, I never would have tired my first century. You sound like someone who knows a bit about your limitations. So, now the real question is, do you feel like stretching them?