in order to help you, we need more specific details. what cam is on the bow? if you dont know,post a pic for us. what year is the bow(first 2 digits in the serial # on the sticker on the bottom limb)? what is your DL and what is the draw length currently on the bow? there may be a draw length module. if so,it'll be on the cam,held on with 2 screws,and will have something like "F5" stamped on it? how much longer do you need your draw length? FYI,a bow press is NOT needed to change mods or strings/cables. the bow can be completely dismantled w/o a press.
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'07 HCA Iron Mace
'08 Martin Bengal
'11 Martin Exile