I am still running the default CTC firmware and it will run any temp that I input into S3D. Trust me, if you use S3D for a week, you would laugh at sticking with Makerware 2.4 lol. I used 2.4 myself as my first slicer. It does the job, I guess. It's almost like if I told you, you are getting 5% - 10% efficiency with your 3d models before you print, compared to being able to get 100% efficiency when using S3D. I honestly could not recommend it enough, it makes 3D printing a far better experience. If you want, I can run you through some files and give you the .x3g to test out.