In article ,
(JDupre5762) wrote:

It always amazes me how often things were designed without any thought to
future maintenance requirements.

I suspect your typical 30-40 year old piston single was designed mostly
to meet a sales price point. I also supect if you told the guys in the
factory who built the 1968 Arrow I fly that this plane would still by
flying 35 years later, they would have thought you were nuts.