Can’t comment on that particular frame (I bought the 29er HPC 140 and it’s a great bit of kit) but Cube’s after sales service is dire. I’ve contacted them about different things over a few years and usually I get no response. The one time I did get a response was about 3 months after my initial inquiry and amounted to, “ask your dealer” (I was trying to get hold of a frame grommet and didn’t know the part number).
I’ve a 26″ Cube Stereo frame in the roof of my workshop, unable to get the ‘sacrificial’ bearings that the main pivot ate – and got no response from either the UK or Germany when enquiring about sizings when a pal offered to machine some up (originals were bollox’d).