A lot of people think that class_sethelpsymbol is required, so some minor changes to the Externals-HOWTO would be good:

http://iem.kug.ac.at/pd/externals-HOWTO/node5.html

Could you change this line to match the standard format:

class_sethelpsymbol(counter_class, gensym("help-counter"));

To this:

class_sethelpsymbol(counter_class, gensym("counter-help"));

Also, a blurb like this would be good:

"By default, Pd will look for a help patch based on the name of the class. An alternative help patch can be defined with the class_sethelpsymbol command."

.hc

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If you are not part of the solution, you are part of the problem.

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