[jluetjen]

What's the condition of your fuel filter? As far as the external leaks are concerned - did you replace the o-rings when you replaced the injectors? What's the stock injection pressure for your car (versus the 3 bars that you tweaked it to)?

I've had great experiences with Marren. What I would do is call them up and explain your situation. I'd also ask him to take them back and retest them to confirm the condition. If any are bad, I'd expect him to address the situation.