Is Ralda SL the main one on the corner by the Petrol Station ?  When you say "register", does that mean you become a member at the same time. ?  If this is the one you mean, I've been in there a couple of times with questions about my baby olive trees and they've been very helpful.  Thye even suggested there was no point in my joining until I had a crop to submit.
I don't have any Carobs to speak of but it would be good to get info re other fruit (Citrus, grapes etc.) for future reference.
Do you know if the backstreet guy will press small qty's of olives and if so, what he charges. ?
If we can gather enough info it would be good to stick it in the "Useful Info" area at the top.  Can someone who lives nearer Tortosa find out exactly what Sol D'Ebre takes ?
Cheers,
Bigyin