I've only vaped 100% PG based flavours thus far and tried some other juices that had anywhere from 10% to 35% VG and it gave a much smoother TH. I will be ordering some pure flavourless PG and VG for DIY juice soon, but wanted to know if it was possible to add some of that VG to my existing "ready-to-vape" juices? will it water down the taste alot? has anyone done this with success?