Regarding Lu: Lu's interminable drivvel is highly counter productive.
It is a turn off to all technically competant people who just can't cope with bashing their head against his verbose and technically illiterate rantings.
What he has managed to piece together about his chosen subject has mostly been learnt at the expense of some of the finest rotary practicioners' patience after his idiotic mis-coceptions have been roundly refuted countless times.
It wouldn't be so bad if he didn't try and pass himself off as someone with authority.
It is down right fraudulent of him.
There are many humble members who preface their comments with qualifiers ("Inexperienced as I am ..." etc.) I'm sure if he did the same many would not feel so angry and serious debate might occur.
I personally regret the damage he does to an excellent forum.
He does one service (IMHO) which is to flush out some of the technically inept who allow their anti Robbo bias to cloud thier objectivity when Lu's 'on a roll'.
... sorry to hijack (but Lu's drivvel should be stamped out where it occurs)