I've swapped a tube into my Sanyo 20EZV chassis and have one small problem left. The end of the glass tube is a quarter of an inch longer or so than the original tube and the neckboard barely hangs on to the pins. In other neckboards I see that there is a hole for the end of the tube to protrude through but not this one. Is it safe for me to drill through the end of the neckboard? I see possibly 1 or 2 circuit tracks I may have to bypass so that part shouldn't be a problem.