Hi all. I'm working on aligning a Leica IIIa's rangefinder but I'm having trouble. It gets very close but always seems to be just slightly off vertically. I now both access points for the rangefinder on this camera and the lateral adjustment is working fine but the verticle adjustment doesn't seem to have much affect. I can't figure it out. Any help would be appreciated. Maybe there is a specific procedure for putting both vertical and lateral in proper alignment that someone can share with me. Thank you for the help!