I don't know what you are getting at, but i have written a lot about it. Velleman K8200 with a ramps 1.4 and a lcd. Windows 7 home 64bit, 12Gb memory, I5 cpu, printing over USB, have done for years without problem up till S3D V4.0. With v4.0 and 4.01, pauses randomly on all prints. Never the same sp...