Yes, I do. For the past three years, I have done nothing but work on this project nonstop. I've been working on massive improvements (that some have pointed out in this thread) that I've been stuck on for the past several months, but I'm getting close to finishing that up.

I don't feel comfortable publishing or releasing anything until I know for a fact that I can make no further improvements. It's not out of corporate greed or anything like that - I'm just really paranoid about getting out the best work possible.

Respectfully, the perfect is the enemy of the good, and it’s entirely reasonable to publish what you have now. If later you make further improvements, you can simply publish again.

You're completely correct, but I'm afraid this is more of a personal problem. I know I'll never be able to forgive myself if I figured out a solution to one of the more obvious problems with the model after I've already published it. I'd just be far more comfortable being happy with my own work before I release it to the wild. I know that this is selfish, and I apologize.