SSL 500-Series SiX Channel

I have many SSL device in the 500 racks. We love the VHD PRE. Recently we decided to expand our pre channels with the new VHD+ and we give a try to this handy SixCH. The sound is amazing, we like it, but something in the components have changed. The quality of the switches dropped. They get blocked quite often in intermediate position that cause big pops in the output and mute the channel. The CMP-IN switch all the time is depressed! The same feeling with the new pre VHD+ compared to the old VHD. Very disappointed!!! We expect the SSL standard, but we didn't find it in this 2 VHD+ and the Six CH that we received. We gave 3 stars because the sound is good, but 2 stars to the quality. This is sad :(