This is what I have set in Lightburn to try and get more realistic times. It really should be 66.7 mm/s I think, but that gave me 18 minutes estimate on a burn that took 10.5 minutes. This yields a more accurate time for that test project.
JD, cant say I have ever bothered to play with the settings as they only pertain to the preview and I had never given much thought to how useful it could be. I have however had some success in burn time reduction by reducing the whitespace traverse in the design phase. I like the idea and will give it a go.