Also, do yourself a BIG favor and count the spiro lox carefully. I got down to the last piston and had 5 lox left. After checking and rechecking and checking again, I realized I got one too many. You'll get the hang of it after about 7 pistons. Brian Dunnigan
I got down to the last piston and had 5 lox left. 
After checking and rechecking 
and checking again, I realized I got one too many. 
