- how far away from the wall are your LEDs?
It's about 8 cm - a bit too close but my tv holder can't be adjust in this direction. I suggest 10 cm - it eliminates probability of appearing "circle lights" from leds at wall but it's close enough not loosing saturation of colors.
- how did you attach the LEDs to your tv?
I used four strips made of plastic linked with each other with small bevels. Such a frame I attached to my lcd with double sided tape. Believe me or not, but I attached leds with standard plaster in a roll :) - it's enough strong to hold them, it's easy to cut and if I want to correct a position of leds it's easy to remove them. I believe that there is something better than this but I didn't have time to look for a better solution ;) .
- how far from the edge of your tv did you stick the LEDs?
About 1cm from edges, leds aren't visible when I sit in front of my tv. When I move myself about 1,5 m to the left or right side I can see leds but I watch tv at the most with one person more so it doesn't bother me at all.
I'll make a photo of it later, I realized that I'm not good at describing things with my English ;)
How did you attached your leds so neatly? They are all exactly at the same height!