I think my questions were a little confusing. I went into too much detail. You answered my question though. You CAN just mix the three herbs together in the proper ratio and then after they have tinctured you can mix them with the lobelia tincture in the proper ratio. The only reason I explained what I had done the two different times is because it showed me that it would end up to be a different ratio. There will be much more comfrey by mixing the three dry herbs together than it would if you made the tinctures separately. That is because the comfrey takes so much more vodka than the others. But, just so long as it is ok to do it that way, that's the way I'd rather do it.
I don't guess I'll add any more vodka to my OLD echinacea. I think I have had them with less float than that has.