Way back, when the first of us were freed from The Matrix, CSM+B was, at the time a cheap and widely available trace element mix due to the fact that it was a popular product with hydroponic gardeners. So, Paul Sears & Kevin Conlin included it in their original PMDD (Poor Mans Dosing Drops) formula. There was no special analysis used to determine what the ratio and percentage of elements should be in the trace mix. The choice to use CSM+B was simply a matter of economy, expedience and convenience. In fact, at first it started out as just using CSM, but later it decided that Boron was needed, that's what the "B" in CSM+B is. In areas where only CSM and not the "+B" was available, Boron could be added by simply adding small amounts of a white powder detergent additive product known as Borax, which is a hydrated form of Sodium Borate (Na2B4O7)
People who don't know this history assume that the trace mix formula of CSM+B is some kind of template for success and should not be deviated from. This is a false assumption. Because of the way trace elements are used by plants, any chelated trace element mix that covers the basics I mentioned, works. Some mixes will have more or less of any of the metals, but that doesn't matter. The most important of these metals is Fe, which is 10X or even 100X more necessary than the other metals. Therefore, Fe is used as a proxy for the other elements. When you look at the ingredient list of any trace mix, the Iron content is the most important. If the Fe content is not as high as CSM+B this is not a big deal, just add a little more of it to the dosing and carry on.
The amounts of trace element that are required by plants is so minute that it really is not worth stressing over. The micronutrients concentration levels just have to be non-zero. If the Fe content is too low, or if the dosing level is too low then you will see yellowing in young leaves (assuming Magnesium and Nitrogen levels are adequate). If this happens then just add more and by fixing the Fe content, the other elements will automatically be taken care of.
Because of this simple procedure of observation, the recipe you propose is fine to begin with. Monitor the color of new leaves and make adjustments from there if necessary.
Cheers,