Boolean operation

i tryed to create parts model with boolean operation,

create and put “ankle” between parts of piece!

3 parts, head, cape and bot and with roundary rectangle, in middle of,

i tryed boolean operation!!!

not worked on 3 parts, one good so i tried alone each part with ankle!!

not worked, just head have hole.

so restarting way of i tried with

modificator, just copy rectangle and change it to suppress parts of! work fine now but when i

“scinde” fusion, remove modificator so ask me!!

exist no way to keep it