i still am out ragously stuck with the problem of attaching that rear part ne ideas?

also im tryin to make the disk break - i want to use bevel plus so it will have all those holes in it
but i try an it neva works - i selec the outside circle first - i have tried with dups an original but always fails for reasons like hitory is on or something
or says 1st curve must be outside other curves even wen i select it that way

ne ideas on that also?

many thx