my advise
Send all the papers while filing, in my opinion you lawyer in an idiot. all other lawyers complete all paperwork, they even send papers which are not required when they file 485 so that chances of getting an RFE are less, whatever document a case worker thinks of getting he has it with him -- so no RFE. do what you have to, wait if you have to but do not send your application without employement letter. imagine getting an RFE for employement and being without a Job at that time, in this economy you never know...