Quote:
Originally Posted by Mighty_oz
Just for curiosities sake why not the internal guide chip ? U'd get less flexture problems that way, not that yours has much anyway from your build 
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I was actually experimenting with a few things when I took these subs, and wanted to test out the external guidescope/STi combination. I find that (depending on the elevation of the object) I can get up to 20 minutes without trailing. I intend to use the inbuilt guide chip where possible, but there are cases when it is difficult to get a good guide star (esp. when using a Ha filter); in these cases it will be nice to have an alternative.