my first sub mounting ring check em out

Im new to the fiberglass think, but im the type that can watch and quickly learn, so im gonna attempt to create a glass box.Im not sure of the design yet, but here are my first mounting rings! I thought i did well and was impressed with em. I did the mounting rings out of 3/4" MDF, and then I did the Flush ring out of 1/4". I almost think i should have gone with 1/2" for the flush, but it still looks good. Let me  know what yall think. Oh yea, about the box design, I think im gonna go with an idea I came up with that I havent seen done yet. Ive been searching for lots of how tos and photos of others projects to get some ideas and knowledge but I havent seen this one yet. Im gonna actually give them the hanging look from the back dash. Im goin with 2 15"s, kinda like a set of big breasts! LOL If you can imagine that picture in ur head. What do yall think?