I think taking antibiotics the "day" before will leave a residue behind that will kill bacteria after you cease taking them. how long that residue last? I dunno?

I agree.  I made this point a few weeks back when this study was first posted.  I think the study was flawed in that they gave ABx the day before HPI and didn't even flush the bowel, so I think it highly likely there was ABx residue.  It's a shame they made this mistake because otherwise their conclusion (re ABx) would have been very helpful.  Nevertheless the study did show that ABx were not necessary for a very good outcome.

Secondly, you guys keep saying that it doesn't matter about this or that. But the cdd in Australia has performed this procedure the most by far, and they have the most experience with it. Everyone is just going to discredit everything they say?

I am very familiar with the CDD protocol, having done it in Sydney.  I think they have always used ABx, because Prof Borody comes from a background of killing bugs with ABx.  These guys just assume it is necessary, because they have never tried it without ABx.  All their training and professional experience has involved ABx.  They find it hard to accept that maybe ABx are not good for you.  Besides, they have a healthy little earner going with their program.  Prescribing ABx and running 5-10 day programs at great expense.  It is not in their interests to go around saying you can do it once at home by swallowing a little poo or doing one enema.  No-one would need to pay for their program.  Those in research and specialist fields of medicine are ego driven.  The more you are reliant on the specialized services only they can provide the more important they feel.  Another reason is that their protocol is more likely to be accepted by medical publications and their peers if they use antibiotics and have a specific regimented protocol.  Makes it look professionally acceptable.