Oh FYI - used the Spire last weekend with .50cal - WOW.
FIVE HUNDRED paintballs in the Spire! Only time I had a jam was the end of the day when I was goofing about over the shooting range to get rid of the last bit of paint.
On a 68/2800 fill, I was getting about 1400 paintballs - that is a a Spire and 2 Lock Lids - and still had air left to shoot a bit more!