Recently had occasion to be stationary for a week or two at a time, ended up shoveling sawdust out of the rails and support legs at the end of each day, then a loader would take it away from there every couple of days. Most mobile jobs there isn't enough to bother with, but again if there is enough log, after couple of days I slide the mill over closer to the pile of logs, gives me new fresh ground and also don't have to roll logs from so far away.