Having now at my disposal for the fisrt time in my life a real, albeit upright, piano - a Petrof from the mid 70s - I have finally been able to put into practice all those technical things that I knew about but which proved impossible on the series of consoles I had before. I find out I can play most of what I propose to study, but I am finding out that it is impossible to get through a complete piece without braking down somewhere. This is not due to any technique fault, as it was before, as they do not occur in the same places and dissapear if I concentrate hard enough - the problem is concentrating that much for such lengths of time. This is the case with some of Bach's WTC, which I am using as study pieces (the preludes in c minor and D major from book I, as they are moti perpetui), but it also applies to Mozart, Beethoven, Schubert, Bortkiewicz and so on. I am not aware of any relaxation issues (no arm hurts) or even nervousness, as I know some of these pieces backwards. I could move on to new repertoire, but the same problems creep into those too, so I am tryng to find a way to weed this out before everything is riuned. Has anyone else experienced this?