@scm,
FWIW:
If you compare the two SDSs between Trition X-100 TRITON™ X-100 Surfactant | Dow Inc. and Kodak Photoflo \14315sfp-1msdgenfilesarchivessds_usdefault�07903.pdf (lps.org), the CAS #’s are the same, so that adding Photoflo with Trition X-100 is not much benefit; especially considering that the Photoflo is diluted to 5-10%. Your Trition X-100 concentration of 3-ml/gal will get about 0.08% (+~800-ppm) which is more than enough (~4X the CMC) to get the wetting and all the detergency that Trition X100 can give.
Your 4-ounces of 91% IPA will give you about 2.8% which is a good concentration and can be complimentary with the Triton X-100.
The 0.1-rpm can be too slow for some powerful machines. It can depending on the tank depth, place the record very close to the transducers for too long a period of time which may produce record surface damage - its variable since the record vinyl formulation does vary. But for your Vevor machine it’s obviously not a problem (damage can sometimes be seen as a dulling of the surface).