hi guys im changing my mates matrix on his fiesta mk3.5 i think i guess the same heater box as the mk3 now ive undone all the clips off the bottom as far as i can see it drops but the back side of it wont and i carnt feel that theres any more clips at the back do i need to remove the whole heater box?? if so how. i dont think i do tho p.s the matrix hasnt been disconnected from the pipes at the bulkhead but i dont think this is whats holding it or tho i could be wrong. cheers paul