i did this also to test, and the link at Github is just the same than blacklist led's in the configurator.
i compare the Json outcome from either of them and resulted the same. > Hyperion 2.012can you share your ledconfig from the webpage and Json? it helps otherss that are struggling with this.
I just did a comparison on the blacklist version vs the version I created by manually adding off leds.
Most the differences are with these values which is why I think I'm able to achieve the desired effect:
I've uploaded the configuration which works for me.. the leds used have been tweaked to get a better alignment for my situation. I'm now using 80 leds in the middle and deactivating 14 leds on either side.