Hello, I bought the K2 Plus Combo with the CFS back in Nov 25. I went to order another CFS unit from the website, but seen CFS C units on Amazon, yet there is nothing on the Creality website. Does anyone have any insight on this? Can I use a CFS and CFS C in conjunction with eachother without issues since the cutting is done differently from one model to the next? Also, it seems like both units are very similar besides the cutter. Can I upgrade my CFS to a CFS C with an upgrade. Im not sure if I should order a CFS C or just buy the CFS.