I saw a thread on this recently and can't find it and don't remember where I saw it, but it was concerning Alumina Lens Covers by Leupold. I have never seen them. Do these covers screw into the objective end of the scope? If so will they fit Nightforce scopes which are mounted very close to the barrel? My NF covers are too thick to go between the scope and the barrels of my 5Rs and I need to find an alternative. Comments will certainly be appreciated.