[APML] Guidescope questions

[Statewid@aol.com]

I am using a Meade 10" LX200 with a Taurus off axis guider. I want to begin 
using a rear cell mounted 6.3 focal reducer but a good guide star is not 
attainable with that setup.
So I'm looking into a guide scope instead. I currently own a Vixen guidescope 
- 70 mm,  400 mm focal length @ f5.7. Since my telescope with the reducer 
will be operating at 1600 mm, will this guide scope be properly matched to 
reduce trailing, or should I add a 2x barlow first to increase to focal 
length in front of my ST-4?
Will this be enough focal length?
Any other suggestions?


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