Madness Mod is something new, now its only additional software and custom bootanimation. My sources are ready for further modifications. If i only have enough time i'l try include performacne settings in near future. As i wrote in first post this is my first play with building from scratch.
Yes try to flash 20A modem. Also I've read somewhere that flashing via TWRP can cause problems. I'm personally using TWRP and there's no problems. If you are using TWRP try to use cwm instead.