Still puzzled as to why I might be able to bleed three wheels and not the forth.
It does make me feel as if the installation did go OK.Otherwise I would not get any joice travelling anywhere ,right? Or not?
William Rogers, are you saying I should still go back and remove the master cylinder to bench bleed ?

Haasman, I am envious of your way. I just could not figure that route..and all the reading I did here
indicated that unlike the 123 &124, with the 126 there just was no short cut. In any case that part is behind me and if I cannot manage to bleed the brakes - I willl give it another try, I am looking at a flat bed....