I do 60 15/10/5/0 + dry
I pretty much use the same weight all the time for the 15min and later additions, then adjust the 60 weight to hit my IBU target. Sometimes, that may include sliding it to 65 or 55 depending so I can use a "round" number addition instead of some weird amount. Makes it easier for upcoming batches, and the thought of using .278 oz drives my semi-OCD brain nuts.