Test base I have made in oil (Miglyol) and water. My personal like is oil. I made test base at 50mg\ml with 2%BA and 15%BB and the rest was Miglyol and it held just fine and have a couple of vials sitting now for over 6 months still holding. Made some at 75mg\ml like that and it crashed.
Tried Tren base and I could not get it to work at all. Then I tried water using the 2%BA 2%Poly80 and 10%BB with water at 100mg\ml and it was rough. Made it at 50mg in water and was ok. I do not react well to guicerol*sp so I stay away. There are some ratios posted somewhere where Tone made it just not sure exactly where. Search the site, Im sure you will find them