Mechanical mods are only dangerous if you're using a volatile power supply - e.g. a lithium cell. NiMH (what's used in the mechanical MFLB) doesn't do this, tho

Mechanical mods are only dangerous if you're using a volatile power supply - e.g. a lithium cell. NiMH (what's used in the mechanical MFLB) doesn't do this, those tend to burst/leak rather than go up in an incendiary ball.