hey everyone I just bought a redfield 1 piece mount for a ruger no.1 off of e-gunparts but I don't know anything about it. has anyone owned this or seen this installed? i am just curious if it uses the existing holes or if it has to be drilled and tapped. any info on this part would be great. I do know that not many people have this piece and that redfield no linger makes it. thanks for the help