Things I liked:Valve tool, Inlet & exhuast valve seals & spring Things I would have changed:The thin white seal that replaces the lead seal did not hold air well. The pump cup does not fit the older 310-317 models with the hole in the middle of the cup, so it would be good to offer this option too. What others should know:I ordered the older pump cup seal and lead seal from J.G. Airgun. A good substitute for the lead seal is Danco brand TEF valve packing rope 3/32" from Home Depot. Cut a piece slightly longer than than the inside diameter of the valve,overlap the ends and install the brass nut. It is self forming and holds air great.