I wouldn't be too worried about any alignment issues. Now that you are aware of the severity of panel alignment from seeing my experiences, I feel you'll be able to have everything where you need/want it with a little tweaking. It's good that you are cognizant of the issue this early in the stage though. I think that will work in your favor
I'm sure that epoxy is plenty good. The reason I asked was I'm switching from the Dupont epoxy I had been using and going to HOK epoxy. The HOK epoxy is about the same color as what you are using. Does your's mix A/B with a 1:1 ratio or does it have a catalyst that it mixes with? The dupont I've been using has a nice sheen, which gives you the ability to see imperfections in the body and is tough as nails, but their catalyst has no shelf life.