RE: Sightler boats?
I still see some around racing and somebody had a few at this years Toledo show but I don't know if they are still being made. The closest one to it is a Twincraft and those have recently been brought back.
I've never seen a long race, we only do 6 lap ones now.
They were good boats back then along with the 3-D hulls but there have been a lot of advances in hull design since then.