This is pretty much a newbie accessory question. I currently have a cheapy Opteka monopod I bought from Amazon. I'd like to be able to use it with my 5D2 which is normally mounted with the RC2 plate from my Manfrotto 488RC2 ballhead. I'd like to be able to attach something to the monopod so that I can attach the 5D2 (hopefully with the quick release plate) so it can be moved from portrait to landscape mode easily -- but if this is not possible, then at least in portrait mode where I do most of my shooting. Can someone suggest what fitting/mechanism I need to buy? Thanks.