My brew stand came with an IC and I have tried the IC in a tub of ice feeding the CF I already had. Mid summer here the municipal water only gets in the 60s and the IC still really eats ice. I need to find a container for it closer to its size. Now I use storage bin that is too big. I have also learned, thanks to members here to slow down the flow of water a little. that helped a lot.
The other thing I have done is to put the IC in the kettle and drive down the temp under 100 then switch to the CF. I try to remember to connect the CF and run some boiling wort through before cooling with the IC.
I have never (knocking on wood) had the CF clog. I put the hops in muslin bags and the pick up for the spigot is up enough where I end up tipping the kettle to get the last of the wort. When it's that low you can see if the gunk is getting ready to go.