I can't assemble Ikea properly regardless of how many bottles of wine I've had.
Regulator service: I like
@Jim Lapenta 's approach. However on the average, paying $30 or less per stage (plus parts) is a steal. Think about it. One gets a regulator in for service. Pre-test it, breaks it down, cleans, drys, lubricate, rebuilds, tunes, and re-test every stage. To me, the cost of parts is where the thievery comes in. Not necessarily from the entity servicing your regs, but from the manufacturer who sells $2 worth of parts for $35.