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Another thread dig here.
Just did the belt mod here and am impressed by all of it. Its an hour job, the pinion extractor tool is good.
My mount had been guiding around 1.5 arc seconds, just always fighting to get the perfect settings in Phd2, and when using the guiding assistant i had extreme dec backlash, too much to guide in both directions, even after disassembling, regreasing and adjusting worm gears to zero slop and no binding. It was frustrating to say the least. I thought I'd try the belt mod before moving on to something bigger and better.
Glad i did. Guiding has been excellent, the calibration that i did first night works under good and not so good skies. I'm now ticking over subs with 0.6 - 0.75 arc second total rms and its no hassle. Its quieter too. A bigger mount can now wait, the system stays fairly portable, hopefully my stars and dark lanes are better defined than ever.
If you're thinking about it, i recommend it heartily.
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