I'm an operator in Australia who has viewed this forum for a long time and finally decided I have something to contribute. I have a WW 2.0 where the boom came down at rear of vehicle, stayed down and then the gantry moved forward, bending the boom and wiping out the rear end of the vehicle $2000 damage! I found what had happened, one of the boom prox switches came on indicating the boom had gone home. If this occurs, the safety eyes don't stop the problem because the software has been told the boom is home. Reason for the post is we had reports for a couple of days of strange things happening which we couldn't put our finger on. Suggestion is if you have the boom doing weird things, check that the prox switches aren't flickering and carrying on.