I have a 2011 Onza 50lb draw bow that has been converted to the conventional cable slide setup and will only peak at 45lbs. How can I get this bow back to 50lbs? The strings have been changed but I still am under the specified draw weight for this bow. I am not near a pro shop of any sort and have been doing my own bow work. I think the only way is to twist up the cables 6 turns and see if the draw weight will get back to where it should be, any expert advice would be appreciated.