2 days sounds good. OnDemand works better for me like 5%+ but you need to tweak all the levels after VSEL to see some differences. Try asking, searching for a thread where they tweak all the levels and it's reported to give a boost.
LG Optimus G - E975-10H- Android KiKat 4.4 by Houston
Past: The almighty Moto Defy with CM10.1 by Quarx2k!!