Anybody have an opinion on the AAR Six Pack Baseplate?

[Rocket]

I can't reach Steve at hybrid fiberglass solutions and was wondering about AAR's offering. Anyone have any experience with these?

http://www.aarqualityfiberglass.com/products/440-six-pack-baseplate-1968-69

 

[earlyrides]

I was just looking at this as well.
where do you get the seal for it?