Few weeks back had problem with serpentine belt shifting toward air conditioning compressor, tearing up belt. Installed new belt and Practical Solutions HD pulley. Problem went away for a couple days then returned. Limped by for a week installing new belts every few days until parts arrived. Replaced complete tensioner assembly at a cost of $160 (moved HD pulley to new tensioner) and OEM belt. Problem is gone for good now. MEGARAM has pulled with no further problems for last 2-weeks. Just wanted to let everybody know in case you run into same problem.