I use a Celestron C14.
The Lhires guide optics were updated a couple of years ago by Olivier, so the guiding is good.
The mount is a Paramount MX.
I use PHD or PHD 2 guiding looping between 0.5s or 1.0 s exposures.
The 314 will fit ok next to the 460 imaging camera.
I am using a Moonlite focuser, but don’t know if it will take the weight ?
Testing both cameras is a good idea.