Don't know much more about STA than you do. It was just one of several diamond plays I've been trading. When the diamond rush started last Sept, I just bought everything associated with diamonds. Made a quick profit when it spiked in Oct, then bought it back for the next run - which appears to have finally started. Only one of the diamond stocks I bought went down - GZD.v (still hold that). I agree with your view of MPV - I'm waiting for a little more strength before buying (or that dip to 1.80).

EVG is looking better - finally showing some strength on good volume. I may pick some up today.