If u run the Wossner, make sure they are RKTEK Wossners. The off the shelf Wossners are standard Wiseco copies.
Kelsey has his own design which is a much better piston.
He no longer works with Wossner so the RKTEK forged pistons are now made by Wiseco. They are the same RKTEK design.
If you want to run cast, then Pro-X would be my choice.
I have run the RKTEK Wiseco's in my '09 Summit for 2 years now. They are the original RKTEK WISECO prototype pistons before Kelcey went into production. SHR tested multiple sets for RKTEK.
Between the piston and pin they are about 80G lighter than the stock doo stuff.