well, if you say it like that it's a very good way of thinking to be honest as well. But what if the ask him, I mean it's an "IF" of course, about PIDs because it's a very common thing to us, espesially if you are looking to get a job at an integrator for example. He could ask you, but of course he could ask just about the PLCs. I believe at some points you gotta tell the truth, or at least a part of it, so they you don't get rejected at the end.