Luca,
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Echoing other responders, this is what I do:
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Most devices mounted to pier extension. plastic split loom houses all cables to scope including: camera usb, camera power, diy focuser, 2 dew heaters, gps if needed. Both ends attached to known spots and the top end exits the scope horizontally to port side. This arrangement has worked well for me for unattended imaging and flipping.
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BTW, I am down in Las Cruces though rig is in storage for the moment.
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Edward
Edward Plumer