This power kit worked out great to make an all worker parts based KronoKer blaster. It couldn’t have been easier to get this setup functioning in this shell. And with the large ID of the power kit dart pusher and a heavy spring load in the Kronos, this blaster outperformed my actual prophecy blaster on the chronograph. Over all I am very happy with how easy this build went together. And with Out of Darts for there fast shipping and great price.