Hello, this is my first post, and I am glad to find this forum. Anyway....I just bought a nice standard .22 from the early 70s, and it shoots and cycles really well. The groups are nice, except they are really high, so I replaced the standard rear sight with an adjustable one. I thought it could adjust it to lower the groups, and it did, but not enough. It still shoots 8 to 10" high at about 15 yards with the rear sight bottomed out. Is there a replacement tall front sight blade, and have any of you folks ever done this? Thanks, Tom