Don;
Been using Maxima to build my own leaders since about 1980, working from butt to tip with varying diameters/strengths.
Then replace sections as you work back from changing flies
However....I use the Maxima all the way to the fly when nymphing
For dries, I will usually add on the supple mono at about 4lb or .007 inch.
You are correct...the butt section usually lasts as long as the line itself
The only downfall...picking up poplar fuzz on the knots