Just updated to the latest version as i was a few versions back. Noticed the preview times are well off on one machine but ok on the other. I remember on one machine in preview i changed the travel speed option to get the time more acurite. On my design machine i never did that. Went to try today and found that option has gone in preview window. Has it moved or been removed.
the one where i had previously made the change it is working fine. on the other machine its estimates are WAY too slow.