Blaster complete build

I have a question I am just after putting a prox racing piston in my blaster and I was driving it and it stop and took the cyclinder of and the ring and sized on the frount of the pistion and the hole on the piston to let in the feul and air have broke
 
I have a question I am just after putting a prox racing piston in my blaster and I was driving it and it stop and took the cyclinder of and the ring and sized on the frount of the pistion and the hole on the piston to let in the feul and air have broke
 
I have a question I am just after putting a prox racing piston in my blaster and I was driving it and it stop and took the cyclinder of and the ring and sized on the frount of the pistion and the hole on the piston to let in the feul and air have broke
Ran lean broke skirt
 
I have a question I am just after putting a prox racing piston in my blaster and I was driving it and it stop and took the cyclinder of and the ring and sized on the frount of the pistion and the hole on the piston to let in the feul and air have broke
Was it leak tested ? Jetted? Broke in?