That's what I was going to say... get all the parts from TK-4510.
Also, as much as I understand your desire to finish the armor by CV, unless you have every waking hour between now and then free to work on it, then I would say it's better to miss CV and do it right than rush just for "one con."
There will be other cons... and, before you know it, you'll be on your way to one of them with your pristine, done correctly, armor you can be totally proud of.
It's worth it to do it right is my point.
As for snaps, the heavy-duty ones are it.
As for better strapping system; all my armor has used "quick release" back-pack clips of various sizes and configurations (side release, top release, etc.) as well as Velcroâ„¢ and E-6000 glue. I think I'm going to do snaps on my next set of armor, but I have always been happy with this set up.
Hope that helps man!
And please, TAKE YOUR TIME!! It's an investment, you want to do it right!