The e curve gave me some problem.
The curve selection can alter base timming. So check it with a light when you do your changes. A no brainer , but can cause a bit of confusion.
The big one for me, cap orientation. The cap is oriented using two tiny roll pins. There is no mating slot and notch. The msd cap inside has ribbing all around which can hold like the notch. Once I thought the base was turning advancing timing. The bolt was not loose. It was the cap that was turning , the roll pins were pressed along the cap perimeter.
The screw cap upgrade solves this.