Suggestion

I had some difficulty integrating signwriter with another module that relies on full URLs in links -- presently, the signwriter-created images are referenced by a shorthand path rather than the full URL. Generating the full URL would require a minor tweak in the the signwriter_url function, from

return base_path() . "$cachedir/$urlfilename";

to

return url($cachedir."/".$urlfilename,NULL,NULL,TRUE);

The added length of the URL is fairly insignificant, but it might make the page output more generalizable and friendly to whatever crawls the page.