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Marc
The Ovision is a single block with worm and bearings encased within. One of the problems with the Losmandy g-11 desing is that there are two independant block in which the worm sits and they can be out of alignment.
Interestingly the HGM Titatn i belive comes with a single block design. Why Losmandy has not done the same with the G-11 is anyones guess. The issue has been raised a lot in the Losmandy users yahoo groups. The first working solution i saw was developed by Rainer who i think is a member on these forums. He created modifications to his mount and that in turn i think has led up to these commercial single block developments.
There has been further discussions on replacing the couplers to also enhance performance further. Also there is the McLennan Gearbox which also have shown to provide further enahncment in performance.
This is not to say that the G-11 out of the box is not a good mount, it is a very good mount. However as always we can tweak it to perform even better, and many have achived fantastic results.
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