Thanks Ben.
Yup, sweet corn. Nope, not hair rig but on the hook (or shank at least as per http://www.canberrafishos.com/Articles/Improving-Your-Carp-Results.pdf) - never given the hair rig a go (keeping it simple to start). By prebait do you mean burley - in which case yes. Stinky maize: now that's a new one to me.
Hear what you're saying on the metabolism etc. So yes, be good to know the time window... I guess maybe in the afternoon they're probably spent their day doing any eating they planned on, so maybe I should be trying the morning for starters.
Thanks again, and I'll keep ya posted.
Oz.