I never had either until I sold a 37'Dolphin off our lot and it had the same Hellwig setup. I also thought the previous owner had added it.I never investigated it any further until the next year when I bought this Seabreeze and found out that National installed them on 33' and larger on the Chevy chassis. As best I can tell the springs are original. My dealership sold it new, took it on trade, sold it again, took it in again, and then I bought it. Both previous owners I have contact with, and they were both meticulous on their record keeping so I have most of the receipts as well as dealer service records since it was new for anything we have done to it. The bell cranks and ball joints are new, the roof on it is 6 yrs old....its been very well maintained compared to many newer coaches we get in on trade, I'd have been a fool to not have purchased it.... I absolutely love that lil ol thing !
1997 National Seabreeze 133 Limited
1993 Mazda Miata
2005 Basset Hound, "Fred"