the clothing item is rigged completely in poser, but i can say 99% works in daz as well, the other 1% left is the FHM issue. in fact i have tested other clothing item which is a daz original product(  compatible both poser and daz ).  I assume that product to be the best sample for references... unfortunately they never relate the ERC between FHM ,only between FBM(master) and FHM(slave), or just between FBM ... so i suspect ERC in poser with FHM as master will never work in daz, so even the daz artists themselves came up with such alternative?

forgot to add in earlier reply, infact i've tried creating ERC in daz with FBM too, doesnt matter if its FBM or FHM, after save and reload the item, the ERC still not working . If u previously happened to be successfully retain the ERC in your saved clothing item in daz then i might be missed something... all i wish to know is the proper way to save figure in daz so the property such as ERC can be retained properly .