Dear @terry9 : " That leaves physics, which is plenty complicated enough to defy analysis in a thread. ""
For me problem is not only physics but that due to all those imperfections that exist including the LP it self there are " hundred " of parameters that are and have a relationsship in between, this fact makes the whole subject extremely complex even to develop a mathematical model with. It's just impossible to do it.
Our opinions in all the posts in this thread are only our first hand expériences that are way different in all of us.
R.