glenn, I would keep the 16" full treads for rain races....sadly, they won't fit over your new sexy brakes! Michaels idea of picking a specific date to swap is better....however we know it will fall at midnight on a Saturday! LOL!
BTW, does CMC have rules about running 16's on the rear and 17's on the front? maybe you could burn up tires that way?! Either way, you are all going to have to adjust spring rates and setups to go to the RR....your wallets are going to be opened one way or another.