Thank you very much for your post.
Well, i am not a pro and i don't make fun to others even if i am right and they are wrong, but there are members who try to make fun even if they are wrong and others are right, but sometimes misunderstanding is a big problem anywhere.
I am this kind of person who can try to help even if it wasn't right help, i read a lot from everywhere, and sometimes i got information or details from somewhere then i transfer it to another, if those sources/resources are wrong then i can't do something to that, and sometimes i do something or help even wrong better than many who knows the right thing or the truth and they don't reply or away busy, but again, if i am wrong then simply correct me and help others by fixing my wrong help, but i really don't like the attitude others trying to make fun of me because i am wrong or new or whatever, and you know what? in the club there are players who are playing long time ago, and they don't have clue about rubbers or blades, so am i bad because i start to recommend or talk about rubbers and blades while i am new or still have not enough knowledge while others who are at it since a while don't bother to learn and know and understand? and when i give wrong information there is always one good thing happen, many members coming to correct, by this i can learn and know the truth or the right/correct answers, and experience is a great teacher as we say, and also we say that there are students beat their teachers/masters, how come this true if any students must shut up because they are new or still not knowledgeable?!!!
About the rubbers, it is like you just said as what i said, the :trampoline" type is actually what i called "spring" or i should say springy, and the other one is just "dampening", which i referring to "Absorbing" or "make less impact" effect, it is just something simple to understand without needing to be physicist or mathematician, even kids know those things with toys and some experiments.
My English is not that perfect or much good enough, i try to help by using another language, but honestly speaking, in many sites of different fields it sounds that people are smart enough so they don't need help from non English or our region mostly online with knowledge or details, and i really don't know if i just come here to watch and listen and do nothing, maybe even shouldn't ask, or if i ask then i shouldn't help because i am not allowed or not ready to help, if that is the case then i apologize and sorry if i recommend anything too early while i am not eligible for it, not a problem, it is nothing easier than stop helping and recommending and let others who are pro and well educated to do and i just keep reading.