RVM, I ran the 15x4W APC for a long time on mine. It does have a harder pull than the Zinger. I like the Zinger because the spool up is instant. The APC is so heavy it would shake the airframe every time I goosed it. If someone was picking a prop with max thrust as their only consideration. The APC 15x4W would be first with the Zinger second and 14x4W third.

david