Not unless SWIY is an experienced chemist who can speculate on what solvents it might be possible to generate calcium bufotenate in.
It's entirely possible that one might be able to form a calcium salt of bufotenine, but it's been pretty clearly determined that this can't be accomplished in water or simple alcohols. SWIY would have to get very creative about solvents to attempt to generate this theoretical salt.
Hell, it may not even be possible to generate calcium bufotenate under any sort of typical conditions.
That experience on erowid that you quote the procedure from appears to be written by a fellow who made it his mission to spread the myth of calcium bufotenate across the internet. It's possible his intentions were pure and he really believed that he was creating calcium bufotenate by this process. But there are messageboards on which he created multiple puppet accounts, and used these puppet accounts to post that they had tried his posted methods, and confirm that they generated calcium bufotenate... When a person makes fake accounts to confirm their own findings as a means of getting other people excited about it, I become VERY skeptical of that person's claims. I've also editted his speculative edits off of wikipedia articles on Anadenanthera and bufotenine several times (he periodically edits them back in). Whoever this fellow is, several of his posts made it clear that he lacks even a basic understanding of chemistry; the stoichiometry of forming the salt baffled him.