PSE Bowmadness drawlengths?

I just got a PSE Bowmadness MC and went to get everything set for it. I went to BassPro and the guy there fiddled around with it for an hour trying to get my drawlength set. He told me that because my drawlength is closer to 26 that there wont be enough let-off and it will be hard to shoot. He set my draw to 27 and didnt tie and set the peep for some reason. I kind of understand what hes talking about but how am I supposed to shoot my bow? Ive looked around on the internet and saw a couple of topics about this and they say I need to get a new module? Does anyone know anything about this?