Nice to see things coming along since I last checked in.
As zool mentioned, epoxy mix ratio is important. I've done it lots of different ways, but these days I prefer to mix epoxy by weight, especially for small batches.
Using a food scale dedicated to the purpose, I set the cup on the scale and zero it, then I fill it to 5/6ths the desired quantity with part A. Calculator gives me the amount (18% in my case) of part B needed to add, and then I slowly add it in until I get to the right amount. Once or twice I have gone over, but it's easy to calculate how much part A needs adding to get it right.
NOTE: mix ratios by weight are slightly different than by volume. Should say on your can, or worst case call the distributor.