Just remember guys no one should be guiding on exposures less than 1 second. For this reason the LPI is a better option for guiding.
All you will be doing is chasing the seeing with short exposures. Any mount that needs corrections as often as every 1 seconds is not suitable for astrophotography….The best guiding is none at all....
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My guide exposures are typically 3 – 5 seconds….. but this means you must have had a very good polar alignment ad decent PE on your mount.
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Some good reading and listening on the subject can be found here…
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http://www.ccdware.com/resources/autoguidercalc.cfm
http://www.ewellobservatory.com/bestpractices/
Regards
Chris Venter