[ercoupe-tech] 1320 lb STC

[dongeneda2000]

I have an early 415C with the "rubberband on the yoke" type trim adjustment, 
window style crank on the dash.
To convert to 1320lb I must either put in the trim tab type trim (which is 
expensive and troublesome to do and I don't want to do it), or change the 
elevator to a "split type" from an E model.
What is so special about the E model elevator that makes it carry more weight?