I have select coticule with slurry stone and I get a very smooth comfortable shave using just the coti. On the worse conditioned ebay razors, it was much faster to set the bevel on my Norton 1k then complete the job on the coti.
I used Unicot until I learned the feel of the stone and migrated to Dilucot, although I distribute the pressure applied rather than just press on the middle of the blade.
A few practice razors is all I used to begin with.
Good luck and have fun with it... I know I am.