>> Removal of this disk IS necessary. It is 'glued' on. Some people can remove it without damage, most will probably damage it upon its removal and in the process MAY also scratch the surrounding areas!!!!!! Exercise caution here. <<
For what it's worth, the red dot can be removed with a pencil eraser by pressing down on the dot and twisting back and forth until the dot starts to come off. Then prying it out very carefully with a small knife. It sould be then cleaned of the old glue with a methilated spirit and glued back with a transparent cement like UHU or yellow rubber cement.
On the other hand, Leica used to sell them (even give them away) in strips of five or six on a paper backing. They are self-adhesive.
For what it's worth, the red dot can be removed with a pencil eraser by pressing down on the dot and twisting back and forth until the dot starts to come off. Then prying it out very carefully with a small knife. It sould be then cleaned of the old glue with a methilated spirit and glued back with a transparent cement like UHU or yellow rubber cement.
On the other hand, Leica used to sell them (even give them away) in strips of five or six on a paper backing. They are self-adhesive.