Hoyt MT Sport Modules?
 

I have an MT Sport with zr200 limbs I need to get adjusted to my draw length and weight. A local archery shop told me I would need to get the modules to get it adjusted. I bought the bow off of craigslist and contacted the seller after talking to the archery store and he said he didn't have them nor did it come with any when he bought it. First of all I am new to bowhunting and don't even know what the modules are, second can someone explain what the archery shop is talking about? Thanks.