Yeah, you can do that quite easily on Fomatone.
Sorry, can't comment on the toning question with MGWT and this toner specifically. In my experience the result depends more on the paper and a little bit how it's developed. With odorless thiourea toner, the mix does matter a lot, but with a sodium sulfide / polysulfide toner I can only see a difference in the rate/speed of toning, not so much the end point. Then again I've never used the Kodak toner specifically and instead brew my own polysulfide toner. Btw, I mostly use it as an indirect toner because it's faster and works at a far lower dilution (=less smell) than when used as a direct toner.