GUBE cover & bottom adjustable for height is adapted for uneven bumpy grounds.To fit the adjustable feets you have to turn it off or in. You can upgrade the GUBE basic module with the GUBE cover & bottom adjustable for height at all the time - also years later: without any tools.
 
Simply put on the cover & bottom out of MDF nature, MDF black colored through, MDF white coatet with natural brinks, MDF black with black brinks or MDF white coatet with white brinks - finsihed.