Oncas- sounds like you got a decent working concept on PCa and its complexities. Your scans could easily come back clear (mine did and I had worse numbers than you mentioned), but.... is that a guarantee of no PCa? ( PCa comes with no guarantees), good to see clear scans as non-clear are not what anyone wishes is their case.
Look into nomograms, Partin tables with all your data collected and see what the odds are pointing to, and this is only an averages gig, some patients could do better or worse and parameters, measuring/assessing PCa is all less than 100% for information etc. Perhaps see surgeons, radiation oncologist and PCa oncologist if you have that luxury, great to hear what they say on your case and compare such and analyze what that tell you, that alone could be the greatest PCa education in the 'real world' that you could ever get.
Good journey to you no matter which path, people herein can help you walk it and get through it.
Dx-2002 (total blockage urinary, 12/12 biop. all postive (80-90%)and gleasons 7,8,9's equally on both sides, bpsa 46.6)= 7 yrs. (current psa .36 now and been dropping on DES- 1mg)