I'm a noob so I might have done something wrong but it's a pretty straightforward forward job. It vents loud when going to access mode. When I go up to off-road mode there's a quick pressure release when the compressor reaches appropriate pressure. It's loud enough that I might startle someone standing there not expecting it with their back to the vehicle. You could hear the previous AMK but it was MUCH quieter when venting. Are there AMK models that are known for this? I just got whatever they were selling at FCP Euro, it came with appropriate kit for the LR4, so I assume it was a model appropriate for the vehicle. Maybe I installed the shroud incorrectly, but I'm not sure how? Any lessons learned from those of you that have worked through this?