Unfortunately, even though they may be ecconomical to fly, they are not so ecconomical to maintain. As mentioned earlier the parts support is pretty bad and parts from the factory, if available, very expensive. Try $2400 for an air filter shroud!!!!
On top of this the poor quality alluminium that they were manufactured with back in the seventies hasn't held up too well and the Ad's applicable to the type back that up.
I think that the concept was good, and definately suited the role it was designed for but as with most of the GA fleet, probably wasn't meant to be still flying 30 yrs after it left the factory. Will be interesting to see how the re=badged
Vulcanair holds up!!!
JS