To me, the pbr mini kit is overkill and was designed to make $ on the uninformed. You can buy the stops, springs, plunger/links, sleeves and bushings for $22. The kit will cost you $36..you'll get some extra stuff like eos switches and screws, but those are usually unnecessary.I never buy the springs either since they are usually ok or an be given a bit more resistance by stretching them a bit.