Etiquette in a Thermal

Walt Connelly wrote:
Okay, let's hear your views on what proper etiquette might be in a
thermal. We all know the first man in decides the direction of the turn
and we should all thermal at the same speed. The Glider Pilot Handbook
seems somewhat unconcerned with the rules and etiquette and the internet
information seems to be the domain of the hang gliders and para-gliders
as to this subject. What say you my friends? (I think we have beaten
the rudder waggle thing to death)

Walt

I'd also like tips for entering a pre-established gaggle. Keeping other
gliders in sight is not too difficult if I am in the thermal and another
glider or two enters... but I have trouble entering with another glider and
ending up in the correct position (directly across from the other glider).
I have been practicing be entering very low as not to disrupt the gaggle,
but I find it hard to judge the entry point and bank to get into the
gaggle. I have been watching other pilots, and it seems they come in fast,
open brakes anf get behind a thermalling glider matching bank angle, and
then continue with brakes to slow down and sort of slip backwards into
safer position... maybe this is not actually what is going on... but thats
how it looks.

any advice appreciated.