A modified version of legislation to provide written assurances of quality care to residents who transfer out of state training centers moved forward in the state Senate yesterday. Due to worries they could cost an undetermined amount of money, Senators twice recommended rewrites to the bill’s original standards, which according to sources, called for a written assurance that residents could expect “equal or better” care in their new homes. Four of its five training centers in Virginia are slated to close. Last week, families of profoundly disabled residents, including those from Central Virginia Training Center in Madison Heights told legislators that private-care homes can’t meet their medical needs.