8-2013 had mine in for the dreaded leans for the third time. Prevost Houston said bags looked good but had replaced 3 ways and 5 way vavles and fitting on 2 previous trips in a year chasing leaks. Told them to replace them. They put 6 on and total was $3600 and change. They also put (2) R12 valves on same ticket and they were $112 a piece.
Got to looking and they replaced some of those up in Prevost Fort Worth about 9 months before. Still hits the ground on back end in about a week. Have ticket if you want to see it. Can scan.