Complete 2 Systems worked on US Goodman A/C: replaced case coil. Recovered ref. Removed old case coil. It took us 2 hrs and one half due to having to do modifications to coil, drain line and copper lines. Installed new case coil, taped it up. Installed return plenum back. Leak tested system. Pulled vacuum. Added refrigerant. It took 6 lbs of R22. System is running great at this time.