I notice you mention JBIG2 monochrome compression in your helpful notes on your very informative web site.
Please may I ask which if any of your products actually support JBIG2 compression.
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Yes, the following product is support both JBIG2 and JPEG2000 compression, you can download VeryDOC PDF Compressor from following web page to try,
http://verydoc.com/pdfcompressor.html
VeryPDF