Just FYI, I recently made up a batch of prop at 100mg/ml with only <5% BA for a solvent in grapeseed oil and it's been holding fine for over a week. This was an experiment necesitated by lack of supplies, but it seems to be working fine, and their is no more pain than any other prop I've encountered.
Might be useful for those that are sensative to BB, and who would still like to brew short esters.

-Stone