I've been approached with an issue, a company has fitted a monitor on to a FLT on hire from another company, and the FLT owners have said the integrity of the overhead protection (to which the monitor has beed attached) has been affected by the drilling of 2 small holes, which I'm inclined to agree with, does anyone have a quote from the 'ISO 6055:2004 Industrial Trucks overhead protection' to clarify the issue? mucho Gracious.