Thanks for the input Dave. Yes, I misspoke and mean LC 502. I will take your advice and get a GPG and GPB colorant from LW. I have some more brown colors (craw) I am wanting to try as well, so this will come in handy.
Truth be told I am going to try and crack the GYCB GP code. I prefer this GP to Zoom GP, but it is just for my own confidence. A recipe listed here and one on YouTube I found call for/use M-F 74 as a base. M-F going out of business has set this pursuit back some.