sounds good...... but i wouldnt cut them 4 inches long and i dont think you need fish stock just boil em in water with a few herbs not to many and use that water to set the eels with a little gelatine , but ive bin told you dont neede the gelatin as the eel water will set naturally....cut them more like one inch.... and dont put in the tail ends, just the rounds and the horse-shoes...
ive never mede jellied eels but eat them nearly every week of me life..... jellied eels i rate barneys the best then micks at a very close second...... i wont waste me time on bradleys no more especialy there