Lamzator Amber 2 DAC


Anyone been tube rolling this DAC? I'm open to Ideas for tubes and upgrades. Thanks.
tubes1988
I've been trying to get some input for the tube options for my Amber DAC over at their forum from the owners but with no luck. There are a couple of open threads on the subject. LampizatorNA doesn't encourage owners to open the chassis and/or change tubes and provides no input when asked about tube choices. I suppose they expect the owners ship their DACs to Poland if/when a tube fails or needs replacement due to age.  
tubes1988, does your Amber II play Tidal MQA content? I know it doesn't process/unfold MQA content but curious to hear if it even plays that content.