1. It is too late anyway since your contest will enter into the judging mode in less than 1 hour.
2. The concept with a cross included/added to an "H" (and/or it's derivated "HH" has already been done in your 1st ranked entry. According to this site's rules, the first designer who uses it owns all the rights of it. This means that no other designer can play with this idea excepting the designer who submitted it first. If you have mentioned it into your brief, it would have become available for everyone. If you like your 1st ranked design so much, why don't you go with it?
Thanks for showing such an interest in my design though.