What are the most sturdy mounts for the pro-hunter, and what is up with the mounts that have windage screws on them and just square holes in them. i have never seen these before? any help would be appreciated. http://www.brownells.com/aspx/ns/store/ ... COPE+BASES http://www.gunaccessories.com/LeupoldOp ... Mounts.asp here are some links to the mounts that i cant figure out, maybe im not bright. if you use these do have to use special rings????