Took my Seneca to the range this morning. I'm having a problem with the windage adjustment screw; it turns 1/4 turn in both directions, but no more. Don't want to force it, so I soaked it in oil hoping I can get it to adjust properly. No rust that I can see......am I missing something? Any ideas? Wonder if a return trip to T/C would help? Will they make repairs to a sight on rifle that they no longer make?