Var ND that ca do 2 things

[luke1100]

Won't vignette on a Canon 24-105mm.
I can still use the original lens hood that came with the 24-105mm lens.

Also.....
I don't think it's possible, but if I can keep using the 77mm lens cap. 

I'm thinking about getting a Genus, I have it in 67mm and could live with that quality. But I've read it vignettes on the wide-angle lenses and wont let me use the original hood.

If anyone knows a veritable ND filter that can do two (or all three) things listed please let me know.

Thanks 

[luke1100]

Looks like the Cokin PURE Harmonie fills all three of the needs I listed above.