Thanks for the replys folks, I was pretty sure it was me and my embochure, the fact that sometimes I could play the note and sometimes I couldnt identified a weakness on my part, good point about having reed chops. Never actually gave that a consideration.
As I pointed out I can play chromatic scales but not until I really put it to the test of playing some songs and a few bars that I find my glaring weakness.
Unfortunatley there are some repairers out there that cannot play the instruments they repair and I am 100 percent against this, as the proof of the repair is in the playing. But I also believe that for an instrument to be put through its paces it needs to be played and we are not talking about chromatic scales.
Re - repairs, yes I have carried out repairs and repads using Straubinger pads. Are they good or not, well thats unfotunatley open to a huge debate and minefield. IMO they are not worth it, but that does not mean for a high end player tryting to squeeze out evry litttle improvement out of there playing, that it is not a worth while investment, I think even the physcological advantage of knowing that they are worth more and are regarded slightly better would improve a persons playing alone.
Flute pads are a trade of, if you use a hard pad “example a Straubinger pad falls in this category”, then it is harder for the tech to prepare and shim accordingly, but the sound response is grealty improved, however the trade of is the flute keys will thunk as they close, and it will require regular fine tuning and adjustment. Soft pads, “as most pad suppliers sell”, make a techs life very easy, minimal shimming required, soft pads make very minimal key noises when playing, and require very little after service follow ups, however in comparison to a hard padded flute, the sound is slightly muffled.
IMO the best bang for buck is a medium density pad 2.7mm thick with a thin layer of felt on the cardboard, double bladder skin. This is what most manufacturers fit prior to sending out from the factory, most chinese instruments have the very soft pads with a high level of felt in them. Whicih unfortunatley generates a muffled tone.
Hope that helps