Hi HumbleTraveler,
I don't have much experience with caapi leaf but I have a bit with rue, especially crude harmalas obtained from rue using gibrans quick caapi tek which works well on rue also. I mostly used the rue harmalas as pre-smoke before I smoke Salvia, I find it enhances and has a nice synergy together...
But what you were after was effects alone, and there has been a few occasions were the harmalas alone kicked in enough that I didn't end up smoking the Salvia and just rode out the harmala flash. Those occasions weren't necessarily visual though there was a significant deepening of the black behind my eyelids which is usually a precursor to CEV's but the headspace was most definitely psychedelic and introspective, with a strong tryptamine component to the feeling IMO. It also had great music enhancement qualities.
You might have to smoke a good amount of raw seeds to get to this level or further. I'd suggest at least a crude extraction or more to reduce what you have to put in your lungs. I do this and then enhance some mullein using 95% ethanol so it's easier to handle and smoke.
Anyways, hope that helps and happy traveling!
"The love I've made is the shape of my space"