unless im mistaken my friend i did state in the thread it is a project guitar. i do know what the specs of a 7620 are as i used to own an original one and im rather familiar with most ibanez guitars. the body was custom made for me as i prefer alder rather then basswood. i do know that ibbys have their own tremelo units and design. But im using a original floyd instead because i have it and i wanted it on this custom body.