My pressure gauge works, but it moves kind of 'choppy' as pressure builds after turning on the pump. I think I'll replace it, or at least have an extra on hand. Many gauges I see are in the $3-$5 range, which seems very cheap considering what other parts sell for. I'm sure these are not top of the line, or even close though. Are there any specific brands of pressure gauges that I should loo for?