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I have the Rowan Belt Mod on my NEQ6 and it does help, as does a regular grease service
, but that depends on how often you use it. In my observatory it gets used alot with narrowband imaging even when the Moon is about. Careful alignment of the worm shaft drive gear is critical, even with a belt drive. I had to grind off a couple of mm from the case to prevent belt drag on the metal edge.
I run Metaguide and have no problems with my graph but i am using a guide period of 2 seconds, any thing faster leads to "over guiding oscillation". Long narrowband subs are no issue. I dither every sub these days as well, it really cleans out the artifacts.
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