best function for fillet

See the attached image. I'm trying to creat a fillet around this boss. The top area should be a large fillet then get small quickly as it routes down & around. Any thoughts on the best way to go about this. I've had trouble with the variable round. I'd like it to just calculate the larges possible radius as it goes around but it won't.


thanks for the help!!


AJ

What's wrong with a variable radius? That would seem to be the correct tool for this job?


Steve