Wow, so this is amazing. I just printed a sample and it turned out AMAZING quality from bottom to top, NOT ONE flaw... I will post a photo soon.
Like I said, I kept my same KISSlicer folder as V4.91 and instead of replacing ALL the V6.03 unzipped files. I ONLY placed cubeitmodV603.exe in the folder and told the slicer to use that for processing.
Time jumped from 10hrs to 14hrs, but the result was amazing.
However for some reason inflate support was ON so it made a strange zig zag pattern around the outside of the model that was easy to take off.
It turned out so good I don't want to mess with any other settings.
FYI: When I tried V605 in the same way first, the printer stated a line error and would not print that file.