Well I posted awhile back about getting mechs and I finally did. I went with the 100gr rocket steelheads. These do not come with instructions or anything and I would like to ask a few q' s to those of you who shot them. When replacing the blades do you screw the little screws in there as tight as possible, also how do you put these on your arrow tight w/o putting a lot of force on the blades in which case they could slip open an cut you. Also I was wondering how these heads perform on severe quartering away shots. I was told with some mechs not to shoot if it is anything more than a slight quartering away shot, and was wondering if this was true with these heads. One last question, they came with little rings that you put between them and the arrow, do I have to use these? Anyways they look like real deadly heads and I look forward to using them on some deer this year. thanks-Sam