Greg,
My Running Chook image was done using the guider setup I have described, but with an f/8 refractor as the imaging scope. I now have an FSQ-106 again.
I have considered going MOAG or longer FL guidescope, but still undecided. Maybe just add a barlow to the mini-guider
Though, with the guidescope being f/4.2 to the telescope's f/5, I thought it should be compatible enough?