Hi long time user of BCD great boot option
my question is i only have one boot drive and use easybcd to get to other drives do i need a copy of ebcd on all drives or just on the mane drive
No you don't need to and you shouldn't.. It would probably cause a malfunction of EasyBCD.
You could install iReboot on each drive however, and use that to boot between them.
Check it out (it's free): Download iReboot - NeoSmart Technologies