uncle b, ive been away for a few weeks due to ike. im just getting caught up on my reading. i dont know how long youve been around these rangefinders, but ive owned one for about 40 years. they are not the bullet proof units you think they are. many are coming undone due to lens seperation caused by glue failure. remember, most are 60 or more years old. lens seperation is very common on ww2 optics of all types. as for repairing them, only a fool or a qualified optic man should attempt that. your friends at duetsh optik will confirm that for you. with regard to my comment on distance being determined by how far we see hits. that has nothing to do with ranging distance. we always use a spotter who is using very good large tripod mounted binnoculars. when he says he cant see the bullets hit, we stop shooting. now if that statement reminds you of a woman having her period thats your problem, not mine. you see, only a fool or someone lacking in experience, would completly trust a rangefinder, a chart, or his so called ability to read conditions. shooting at prarie dogs on a dirt mound and seeing dust fly on the shot, isnt anything like shooting at a deer standing on a distant hillside in trees. youve obviously not experienced that or you would have known what i was talking about. and no im not the distance police. but fact is much of the talk about distance is ********. yes it can and is done on a regular basis. but mostly by those using a team of experienced people, using good equiptment. especially on shots beyond 1000 yds. rangefinders and charts are necessary tools. but only to get inside the ballpark. after that it takes ability.