So I am hearing for this course you need a reflex hammer, otoscope and tuning fork... Will cheap one's do for the purpose of this course? Also my main concern is there are tons of different types and options for the tuning fork. For those who have taken the course what kind of supplies did you get and what kind of tuning fork did you buy? The options of a C128hz or a c512hz throws me off... Any advice will be welcomed. Thank you.