Acrylic does sound pretty tough (other than scratching easily) from what I have been reading.
I think we tend to overbuild our tanks and stands, but when you think about it, if anybody would tend to overbuild the tanks, it would be the manufacturer. After all they are the ones that need to honour the warranties.
Anyway - as we all know....this thread is useless without pictures!
(where's the emoticon?)
This is my present sump area that is going to be rebuilt:
I'm thinking of building a single wall unit, painted white. The new tank will be backing onto the other side of what you can see here.
I've already received a new 300gpd RO/DI unit plus 2 jumbo BRS reactors. I started one of the reactors on GFO and this week I'll be starting the other one on GAC next weekend, replacing the current Deltec FR509.
Mitch