filleting expert

hey guys, I checked out some of the programs on the market and though rhino is great in many ways, its filleting  is quite lame and does not allow parametrical changes after being made//I checked out fillet expert for solidworks...it automaticaly creates patches as well..it would be great if rhino had something like that because I feel the design process is a one way street and you can't change anyhting after its been done..does anyone have a clue about this subject?