Digital BW, The Print

Im happy to report that my 1160 black printhead is now printing again...
followed Doug Fisher's suggestion that there may be a clot in the tubing
somewhere, I removed the tubing from the CFS and replaced with tubing from
another set of CFS not in use, after that I vacuum-filled the cartridge and
now its running good as gold...

Even though its now working properly, I am still puzzled over the aetiology
of the clog, I had a closer look at the original tubing, and there doesnt
seem to be any clot in there...

Thanks to everyone who have offered suggestions, much appreciated.

Kevin