Apropos of nothing at all, I have to report that this base has an unusual kick to it. "Unusual kick", that is, in terms of its behaviour in a goblet blender. I tried a stick blender, but that was clearly not going to be up to macerating the seeds, so then I put some in my trusty Kenwood Major goblet blender, to the level to which I normally fill it when blending KD1. It went everywhere. I reduced the level by one-third; it still went crazy. So I ended up backing it off to 1/3 KD1 volume, at which point there was still an almighty initial kick, but if you can contain that, then it settles down. This is, I suspect, due to the high oil content, oil having far greater viscosity (and hence inertia) that water and onion ...
** Phil.