It would take at least 3-4 years, IMO, to: i) improve the suite of assays and the positive/negative algorithm; ii) validate the new system in animals and/or small human trials; iii) conduct a new phase-3 trial with powering similar to DeeP-C. (Note that DeeP-C, which had 10,000 patients, took two years to complete.)
Adding in time for preparing the new PMA and the FDA review, it would be about five years before a new version of the test could be on the market.
Thanks DD. I've never invested in a diagnostics company before and I'm not compelled to start here. ; )