Abput 6 months ago I got my first tenor, a Martin Indiana. I had it repadded, seems to sound great. But I find when I play low Bb to G the octave key has no effect unless I have a fairly tight embouchre. In that case the horn "hangs"at the higher note when the octave key is released. Had the horn checked, no leaks. The lower octave key pad raises up about 3/16 or 1/4 inch, the little tube or spud is perfectly clear. Works fine for A and above. I guess I've unconsciously been "lipping" up the notes to get it to work, so I can live with it - or perhaps this is a characteristic of tenors. I've also tried other mouthpieces, same result. Never had this problem with my alto, Cmel or bari. Does anyone have an idea if something is wrong with the horn - or is it me?