I think it would be a good idea if PG supported hand-generated epub, mobi, and if PG would allow volunteers to easily offer-up hand-generated HTML of existing PG catalog items that do not yet have hand-generated HTML. As this example shows, when PG doesn't offer these [obvious] choices it simply forces would-be PG volunteers to post their efforts elsewhere, thereby diluting the usefulness of PG efforts -- because if a reader wants to find a hand-generated epub, mobi, or even frequently a hand-generated HTML for PG library offerings they have to go search places other than PG to find those versions! And in turn, those other posting sites are even less likely than PG to post "bug fixing" updates to those efforts, again, diluting PG efforts....
A few weeks ago, I appended to this forum asking if PG was interested in hosting hand-crafted epubs....