Of course question is welcomed.Dude, relax. Someone has a question as to why, what's wrong with asking? There are a slew of reasons why he/she might not know the answer or don't remember even though they have taken 4 classes.
If you want to push people out of this sub-forum, why not focus your energies on the ones who keep insisting that the non-DIR answer is the right answer to give when questions are asked here?
I have no problem with the question until the OP mentioned that he has done 4 GUE courses! Double bladder and bungee "controversy" are covered right in the beginning!