Ernie , the front section comes up with the flip section so don't try to separate the two. I have found that some of seats have a ten MM bolts and the rear section can be Phillips head screws but the bolt sizes/threads are the same I think.
I'm throwing out a vote for going without the bolts when you get done. Some guys just can't stand the idea of that but I've blasted flat out 140+ and never lost anything. If you go Maxgasser, you may want to put a padlock on your seat because everyone covets your seat!