Filtering that slime is impossible gentle vacuum to no avail.
A fitting disk of this paper used:

If it is anything like harmalas after all, I consider it non recuperative.
So for making a chem analyses of it, it has now lye contamination if I dry it out. And what does it bring me further than a name X or Y? I cant work with it however it calls.
It's ditched
Focusing on my hard precips from here.

Yield: 6.14% dried freebase (there was included one manske along the process). This lets me suppose that the ton of discarded slime was not in particular compromising the yield.