I am seeing reports on how the Tunze nano 6055 is being delayed again do to drive shafts. Basically in other lower models, mainly the Tunze Nano 6025 and 6045 the drive shafts have become to get loose and cause friction with the rest of the unit. If this has happened to you, Tunze is replacing motors for no charge. Tunze is known for there extraordinary customer service even so, this is yet another delay in getting these controllable water pumps out on market. The question is of course, would you rather buy a unit that has been tested to work and not fail to feed your SPS corals water current? Or would you like your Tunze nanostream to fail and your SPS whether up and die. The answer is quite clear, and kudos for Tunze for getting it right. The next expected date is Mid April, if you pre-ordered from a dealer/vendor earlier in 2006 (read: Sept 06) you will be among the first to receive your units.