The beast name has been around a long time it will depend on what year it is.....
If it's an oldie, I doubt there would be parts or a lot of adjustment, nor would it be worth putting any $$ into it.
The 2018 model goes from 27.5-33 which would cover almost anyone but a short draw guy...but likely if you got it for free, it's liklely not a newer model.
I'm from Central MA like you and I go up to Jaffrey, NH at Pelletiers Sports, they are really good guys up there and will treat you right. They sell Mathews, PSE, Bowtech so all the brands are covered. Tax free and worth the easy drive.
There really is no good shop in Central MA that will want to take their time and take care of you like Pelletiers does.
While your up there hit up Kimballs Farm for Seafood or Ice Cream....