"... how long have you had the 'make a pdf' feature? (Probably ages & I've just not noticed it before, with me being the world's most unobservant man...!)"

I think you may get the award :-) That's been there for a long, long time.

The other site for other folks to contribute was going to be a new venture though, not an extension of my self obsessed and own-trumpet-blowing work at megalithomania :-)