woh nelly, thats a pickle, the accounts i've seen of people actually putting in a fixed bridge rather than just blocking it have come along with huge amounts of wood filler and i think (in case of the 350DX) you'd be better off finding an RG321 and just replacing that bridge. not that guitar isnt good, its just that i think you'd save yourself alot of hassle and some money buy buying another guitar, and who doesn't like a perfectly logical reason to get another guitar
edit ^ or do what he did.