He's done the right thing, if he's a mod & can do it he does right. There's a reason I posted my comments, it involves a court case of a tradesman I know & the manufacturer of a piece of equipment he modified, lets call it a "bespoke tool". His employee got injured using it & the outcome for the tradesman wasn't good. In court a rep' for the original piece of equipment was asked if they would recommend such a modification to it- the reply- NO, absolutely not. Cost him dearly!