Thread: T-Rex and Vixen Porta Mount Owners
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  #9  
Old 22-03-2018, 08:45 AM
AstroApprentice (Jason)
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Join Date: Dec 2015
Location: Melbourne, Australia
Posts: 349
Avalon Instruments motor kits for T-rex state a gear ratio of 720.
http://www.avalon-instruments.com/products/motor-kit
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