Question for the guys running the CHHC-1 still, I know it came out a long time ago and was superseded by the CHHC-4 but a friend of mine wants to sell me his lightly used unit and I'm just wondering if there are still guys out there still running their 1's with no issues? Just debating on picking up the used CHHC-1 for cheaper or just shelling out the money for a new unit.