Found this by accident - looks like a nifty accessory for prefocusing prior to using the Autoguider :
Quote:
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STI Autoguider Focusers were developed by Stellar Technologies International to specifically overcome difficulties in focusing the SBIG ST-4, STV, Meade 201XT, Meade LPI, and Meade DSI-C, Starlight Xpress, and Orion StarShoot cameras.
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http://www.stellar-international.com/index1.html
Might get one.