Yes, as I do my postural drainage part of the full therapy I also do the same as you, clap over those lower lobes.
At the start of all this I asked myself , "How will I be able to do all this later on." That is somewhat of a 'laugh' because it is later on for me....I'm 82. So I wonder if I will be taking myself into my nineties doing all this. Time will tell. Thank goodness, for now, I feel well and am reasonably strong. The worst thing for me is the need to constantly clear out what comes up into my throat just below the adam's apple bone. This constant work of having to clear it out causes me internal tension and I need to relax for a bit during the day due to the work of getting the sputum up and out. So for some they have a hard time getting it up and out and then for me the opposite. As said so often....we are all different.
Barbara

@reneemc have you had success with the inversion table? It’s tempting to try. I talked to the pulmonologist about it who did not think it would be helpful unaccompanied by percussion. But then again I don’t think they have any direct experience with this. I am interested in how it’s working for you.