I have seen a few video's and posts about the trigger magnet mod for the 170/180r and I am curious what method works the best? I have seen just putting a 6x3x1.5mm on top of the spring as well as replacing one of the screws with a magnet tip screw. If these work equally well, it seems like the screw method would be preferable, but I haven't been able to track down the correct screws. Any insight or links to help me decide would be great. Thanks.