My local pro shop has the DART system, which is very similar to the techno system. I have shot in a few leagues with it and HATE IT!!!!! My problem is I am very competitive and cannot just shoot in a league environment just to have "fun". The DART system like for you put the arrow right in the middle of the shoulder, a shot you would never want in real life.
As far as tips go, I have gathered a few.
1. We shoot four guys at a time. You can figure out who scene your next scene will follow. Pay close attention to where the bullseye is and aim for that spot (not always where you would normally place your arrow) if you are concerned with score.
2. Don't worry about the score, just place your arrow where you know it should be and accept the score the system gives you and just have "fun" shooting.