Your missing the point , I wanted it to integrate smoothly inside with the rear mudhugger as in the pics to stop the mud piling up on the rear pivot . On its own it would fit as yours has , but it did limit clearance a bit on muddy daysIf its a Mudhugger FRX front then it DOES fit fine without cutting a bit out of it.
I've done it on my Rail 5, see my pics further up in this thread.