Ruh-roh, screwed up the epoxy mix

I went to add more fillets today and noticed yesterday's were still squishy. Ruh-roh. I haven't used this epoxy before and thought maybe the cool temperature just makes it take a long time (though unlikely). So I carefully made up another batch, added more fillets, and it set within a couple hours. So I must've screwed up the ratio on the first batch. D'oh.