Hello! This is my first post here on the forum and I would like to begin it by thanking everyone who posts on here; this forum has been a huge source of information for me, basically like the film school I couldn't afford, so yeah thanks everyone.   I just recently acquired an Arri 2c, one that was advertised by the seller as a high speed model. It has the tachometer that reads up to 80fps, but from doing research on this forum and others, I understand that it is possible to attach that tach