I made a post not 2 days ago regarding my Viper Classic. Its the cheaper of the Summit Climbers. The bottom part kept "creeking" and it was not easing to hear while 30'+ up in a tree. I took the bottom back and exchanged it, last night I went out with my new bottom portion and original top portion, this one is worse. Im going to call Summit and see if there is a "silent recall" like car companies sometimes have. Although, I would think any recall would be made public information given the high probability of injury under the circumstances in which this "product" is used by its owners.
Believe it or not most of the time the "Creaking" you hear with the platforms has to do with the powder coat in the teeth on certain tree styles. Its weird I know but trust me, the powder coat makes noises against certain bark.
Take a file and rasp all the coating off the contact points with the tree and I bet the noise goes away.