My new SCR2 started creaking last week when my backside was on the saddle and I was puuting in the effort. If I reduced the effort or lifted off the saddle, the creaking stopped. As is usual, I greased the seatpost thinking that was at fault, but the creaking continued. So I took the saddle off and greased the saddle rails, but this morning it's STILL creaking What should I try next ? Should I grease the seatpost clamp too ? Or is it known for Selle Royal Viper saddles to creak very loudly and transmit the noise down the post ?