I've tried several brands of chartreuse colorants and only use the x2 product now because I do mostly tail colors with chartreuse and don't need any bleeding issues....and I don't have any with the X2. As mentioned before, if I want a thinner or more transparent color of chartreuse I just chop up some scrap and put it in fresh plastic with some stabilizer and re-melt it. If it needs more thinning I let it cool and repeat and if it needs to be a little stronger I just add some more chopped scrap. I'm probably not getting what I make as transparent as what you show Rucker, but then I want my tail color to jump out, stand out, from the primary color of the bait so I make a pretty strong chartreuse. A thin, very transparent chartreuse can get lost next to a bolder color like the green/red flake you mention. What I have found in toying with the many other colorants that make chartreuse is that the more transparent they are, the more likely they are to interact and bleed. Sometimes its just better to settle for less transparency in the color. Its hard to tell from your picture but I am pretty sure I have thinned out the X2 chartreuse and made a transparent color very close to what's shown, but I didn't get there using raw components except the plastic.
Something to think about when bleeding occurs: often its not the color you suspect so much as it is the color it sits next to. Colorants are formulated using pigments and while the pigments may be fairly colorfast in their own element they may not stay that way when influenced by pigments and other agents found in a different and contrasting color....like a body color. Bleeding can look like it is beginning in the chartreuse when in fact its beginning in the other color because its made of components that won't play nice. And I'll throw this in here: the only X2 color I have ever had begin to bleed was the fluorescent orange and that happened only because I jack the color to the heavens for one order. I took the same exact plastic as scrap, cut it up and re-melted with new plastic to dilute it and never had another bleeding issue with it so I am convinced that we can force bleeding by over-loading a batch of plastic with colorant and that would apply to ANY brand of colorant in my opinion. More isn't always the answer or better.