I already own several "standard" Lee filters (100mm) including the pricey Big Stopper, several grads and of course the full size filter sytem for my old Nikon D300 but lately I've pretty much replaced it with the Olympus OMD E-M1 and the 12-40 mm f/2.8 lens. I would however love to somehow use my existing filters on this larger lens (by micro 43 standards) without having to buy the Lee Seven5 system and completely dupliicating the filters I already own. Is there some sort of DIY way to somehow modify my standard Lee filter holder to fit onto the 12-40 lens and the appropriate ring holder (62nmm size) for this lens? Has anyone else run into the same issue in transitioning from Nikon/Canon to micro 43? Thanks so much for any advice or suggestions!