That's a good question. Yes, a big part of it was aesthetics. I like the look externally, and it covers up the fact that I had runs with the solvent while building or modifying all of the internal acrylic. Also, I overlapped as many of the joints as possible while doing this, which means I have that much extra support on the joints. And, the extra 1/4" thickness adds that much more support. It was a lot of extra work, but I want to be completely confident I won't be blowing seams down the road.