I am modding a MHS saber I built years ago to add a Vandal latching switch. I have all I need but I need to widen the hole on my hilt to fit the bigger switch (I formerly had a standard black latching switch). I am comfortable with drilling but I had a question about the bit and tap. As I understand it a tap is used to add threads. In the video CSS posted about switch holes it doesn't appear his 16mm hole is threaded as the switch drops right in. So my question is if I just want the switch to drop in and use the nut and bezel to secure it do I still need to tap the hole? Also is the bit in the initial post still the right size?