The only reason to convert to epub first would be so you could easily use Sigil (or other editing software) to fix up the formatting and OCR errors that will be anywhere from mild to "holy hell what is that?!"
I definitely back up my topaz books in an epub or html format for future security/use, but as long as I have a device/app that can actually read those original topaz files, I feel no need to convert them to mobi.
Last edited by DiapDealer; 07-01-2011 at 12:58 PM.
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