guiding

Afternoon,
I have a celestron 1100Cpc F/10.
Want to have autoguider. I was thinking that since I have a pro-optic 90mm musk f/5 I might be able to just purchase a good guider to use as guidescope. I do have a reducer for the scope to be at 6.3 if needed.
Somebody on this forum mentioned a QHY5L camera. I was looking at the QHY5L II Color Planetary Camera and Autoguider version at $245, that could also be planetary. Does this sound like a good setup? and then, is there something better like that orion autoguider getting all press?
In researching, I have seen mention of 3arcseconds per pixel as a general rule I believe.
Thanks for any input

Using an SCT you would be better served by an OAG. Mirror flop and differential flexure is a tough nut to crack with this type system. The large the guide scope the tougher it is in my experience.

A mono camera is a better idea for a guide camera. It is more sensitive and that is important.

I use a guide setup that has 6 acrsec per pixel and it works fine, but I image under 1000mm too. If your imager is 2000mm + then I think you need to be closer to the imaging image scale and that is why OAG is a better idea.

You have not mentioned your image scale or camera. But your scope is 2794mm and the reducer will give you 1760mm. So you will probably will be below 1 arcsec image scale. This is interring into tough territory for guiding.