Tobias, do you refer to the Pierre Lurne's SL5? If so, I can confirm that I have been using it with no problems for 11 years, and the only problem I had recently (you might have seen my post) was due to my leaving the dust accumulate, and not keeping the arm clean, only God knows for how long. The "problem" was then sovled in 5 minutes. However, recently somebody said to me that because the SL5 also has a pivot of some kind, it is was not truly linear. But who cares, the tracking is and remains linear, as far as I can tell, with all the advantages of linear! And this for only a fraction of the price for one of the big names, not to mention the hassle of pumps, etc.
