Ta per d own a 3 00m m sec ti on of both si d es i n th e en d of th e bea m , n a rrowi n g i t d own to 60m m to fa c i l i ta te c ra n k c l ea ra n c e. I f th e bea m h a s been g l u e l a m i n a ted , sc ra pe off th e extra g l u e a n d tri m a l l su rfa c es even .