Although I like my HS50, I would like a better base black level. Has anyone tried any filters on it eg ND Neutral density, or FLD? And any recommendations. I tried a medium ND density on my old projector (AE500) and I didn't like it - it didn't really improve the black level - just made it dimmer. I also tried a FLD on my AE500 before and it did give a slight improvement overall.