...is it alright if there's technically more than three items?
as far as swapping goes the requirement is to complete the minimum, in this case 3 items. a lot of people that are considered "great" swappers go beyond that a little. you always want to remember to be fair to your partner as well, so you wouln't want to send above and beyond what was required unless you let your partner know. that way your partner doesn't feel bad about not sending as much.
seeing as i am your partner i look forward to whatever you craft me, and if you go over i wouldn't be upset