1. Optical Scan readers capture an anonymous image of the ballot as it is scanned. Since ballots as submitted are anonymous, ask also to see the Absentee Ballots which should be an actual paper trail. No personal information is included, so there should be no legal reason to not release images.
2. Using Verified Voting's resources, determine the possibility of getting the election results you want to investigate. Use a certified FOIA request to election officials to demand the images. They could cooperate, refuse (for true reasons, or bad ones) and/or drag it out, so to get an answer as soon as possible, go in person and take along a couple of brand-new, still-wrapped flash drives and download the images. Count the votes, placing into a spreadsheet to track them efficiently.
3. According to Verified Voting, FL supposedly has some Optical Scan machines in use.
https://www.verifiedvoting.org/verifier/#year/2016/state/12
{Click on a county to get quick info on it.)
Below the FL map see the machines listed as being used.
4. To check Florida's machines for "Security Concerns" & "Important Notes" = see their vulnerabilities.
a. Click on one of those machines = go to the page or choose to work in a new tab.
b. Or go to the right-hand column on this page:
https://www.verifiedvoting.org/resources/voting-equipment/
5. To see Florida's 2 pages of county-by-county list of machines used, scroll down to "Search Equipment" dropdowns in lower left. Select Florida & 2016, and SEARCH.
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Nothing to lose. . . because it's a sure bet the SOS of Florida would never call for a recount of this election.