latching relay problem

Thnx very much, i just wanted it to switch 1 load so i remove the right hand relay just to make it easier for myself.I am looking forward to trying this out i just need to get to my local scrap yard and get some relays out of some cars and i am ready to go. If i use the small circuit board sized relays connected to a bigger one at the end of the circuit to carry the 240va/c 5A load i could make this quite compact and fit into a small box. THAT would work as well wouldnt it? i just need to get the same layout relays they are only working on a small load ,oh and i added a diode on the circuit otherwise when power was pressed on the pulse would initially go to the main relay and switch it on before it got to the 2 relays that starts it all going.It would take the pass of least resistance and fire the main relay first unless its coil was a higher resistance than the first 2, take a look and follow the pulse in thru switch on relay 1 then straight up to right thru that switch on relay 2 and out,Do you see? So if i put a diode in the line directly to the left of relay 2 with stripe facing down towards relay 1 it will force power thru relay 3 and relay 1 thus completing circuit. Next pulse goes thru switching 30 and 87 on relay 1 powering up relay 2 which switches off 87a and 30, thus killing power on relay 3 and relay 1 and ultimately killing output to 240va/c relay.Sorry for long post but i sat and looked at this long and hard.I think im right ,just let me know what you think of my diode idea.thanks very much for your help,how are you on LM555 timer circuits :)