I've been DIYing for several months now and use TFA flavors, the water soluble ones. I recently tasted a DIY juice at a vape meet that was made with sweet tangerine from Capella's. Great, I'll get some and make a batch, except when I went to order it, it says it's oil soluble. Thought I read somewhere a long time ago about there being some difficulty mixing oil based flavors. Anybody have any advice for me? Is it safe to vape or is there some special treatment for making a juice with oil based?