hi arnoldc
you are correct - this arm looks promising, but the fact that it hasn't been 'adapted' by analogists could tell us 'something' about possible dependability and longterm performance.
linear trackers are really cool arms but they need good engineering as well. Bo presents and swears by this that his arm is highly regarded in his part of the pond (Scandinavia). However, my concern is that the arm itself travels in a glass/acrylic (?) tube via the horizontal force of the record; note that there is NO lubrication or BEARING system (aside from the sliding bearing that rests DIRECTLY on the tube). Physics tells us that whenever 2 bodies rob, there is friction (talaga, kahit ano i-rub mo, may friction
). The arm wand, with its bearing sliding on the tube will have friction, and friction will produce resonance, and resonance will be picked-up by our cart, etc. . . you get the picture. . . PLUS, dirt will definitely deposit in there and bind. . . good/better quality linear trackers are all (?) air-bearings, minimizing friction & dirt deposit, so only our records sing, and not our arms
now, if we can DIY an air-bearing there, then, we are in business.
i've been contemplating this arm for my other TT, but the issues I raised really bugs me.
stay hot!
egay