Fusion - Fullscreen PAL always has border top and bottom

Hi all, I'm using Fusion for my Emulator of choice for Master System & Mega Drive (Genesis). Something that's really bugging me in that fullscreen on PAL games when I keep the aspect ratio, there is always a border top and bottom. What I want is for the image to be stretched full height while keeping the aspect ratio. Anyone have any guidance?

try other if not works :
Gens.

KEGA Fusion is awesome and I think the performance of the games is better then Gens but you can't go wrong with that either.

You can also play a crap tonne of Rom Hacks on SSega.com