Andy might of found his soul mate on this forum with monty
Well if I'm honest to ask a question about Mass Moment of Interia [MMI] and Centre or Precussion is quite a clever question but you need to understand they are related as one, MMI, effects the other, otherwise you wouldn't put the 2 together. It wasn't just a wild guess or lucky question!
Saying that, then to ask a question about CoR [or ACoR] and pressing after a question like that is a bit stupid, as the answer is simple because pressing is related to rebound. So if you quote coefficient of restitution you should know this, therefore making the question like I said a bit stupid
EDIT: Monty may I was being a bit harsh here it isn't a stupid question I missed the bit about "If at all" so I appologise
Please combine this answer with the answer to your second question re: Optimum pressing