ingest this stuff at your own risk. It is not something I would ever do. Eating that stuff sounds like the worst way to spend a couple hours. The nasuea and physical feeling of toxicity present with bufotenine is nothing like ayahuasca or cacti etc, which simply produce a sort of nausea than can make one purge and feel cleansed etc..
There is no feeling cleansed with bufotenine. The physical side effects really do feel like you have been poisoned and purging does not aid that for me. After having used this substance many times in very high doses smoked and also some experiments snuffing it, I could never bring myself to actaully eat or drink the stuff.
Drink the ayahuasca, and then snuff or smoke the cebil or yopo. I dont know of any traditional use of these seeds in ayahuasca brews. They are traditionally used with "ayahuasca"(Banisteriopsis caapi) but not as a brew that they ingest. The Piaroa shamans are known for the strongest yopo and they add powdered caapi to the snuff..and sometimes chew sections of caapi before snuffing for sublingual absorbtion of the harmalas.
The only instances of oral use I know of are in chicha beers..where seeds will be added to the beer, the alcohol content likely producing a vasodialating effects(stronger than that of harmalas) that offsets the toxic feeling vasoconstriction of the seeds.
You dont have to take my word for it..but I know buftenine very very well..and eating it just does not feel like it is something I would want to even try. If you do, start very very small. I think jorkest has tried eating seeds before, but I dont know of anyone here adding them to ayahuasca brews. I have used cebil with ayahuasca many times, but always snuffed or smoked at the peak of the ayahuasca.
Long live the unwoke.