Thanks. I'm still tinkering - I mounted the laser on the side so I can activate it with my thumb now without removing my left hand from the forward grip - with the trigger I can activate the laser and the light at the same time. Also no longer interferes with the optical sight. I think that's about all I can do for now, but I'm pretty happy with the results.
And yes, I love the HK.
EDIT - here's a pic the new configuration.