best way to seam?

What is the best way to join two pieces of granite counter?

I have been using shims to level then a 2 part epoxy with color dyes to tint the epoxy then using razor blades to spread the epoxy into the joint, push the two pieces together as tight as possible and use a razor blade to scrape it off when it is halfway to hardening.

 

Just trying to improve my joints, any advice is helpful.

 

Thanks