Sitting down over 3 years ago with google trying to figure out what kind of coil my CE4 clearo had and why it tasted so bad was the best thing I ever did. That led me to learn to revamp that clearo's coil then once I got some wire and silica to rebuild that clearo. Now today its a matter of sitting down for a few minutes and rebuilding any one of my attys and enjoying a top shelf vape.
I was reading up on DIY juice for months but so many make it sound difficult to do, throwing away mistake after mistake and making juice that didn't taste like it was suppose to. I was reluctant to spend the money on supplies to give it a shot. Found some dram Loranns concentrates at a bargain store, read that you can use them so I bought several and began to change my commercial juices and had nothing but success, today a year and half after finding the Loranns I have quite a collection of assorted tobaccos(Hangsen), tobacco absolutes and now a NET that I made out of broken cuban cigars and lovin the vape enough to buy tobac leaves and start building NET's on a permanent basis.
Don't sell yourself short like I did by overthinking the could be cons of DIY juice....there aren't any. To me its not the money saving from rebuilding coils or DIY juice but the gazillion fold improvement of your vape quality compared to commercial juices and stock heads.