I went to CoC from Crossfire and started using my three figs to a base Crossfire miniatures. It works just fine in my opinion, you just need to find a convenient way to track casualties. Unfortunately not all platoons or squads are divisible by three, so I made up some individually based figures to make up odd numbers and to use as ‘loose change’. That worked very well. As I found CoC was becoming my key set of WWII rules as I built new platoons I based the figures individually and even rebased some Crossfire figures to single bases. I still play the odd game of Crossfire so I still have a few companies of miniatures on multiple bases, but no reason why you can’t use these for CoC.