ya not to sure about the plexiglass..... at least around the sub...
if youd do have problems with the 1/4inch plexiglass look into this site...... seems pretty decent price with lots of different thicknesses and sizes to chose from... i bought from them before, with some pretty thick 0.708 thickness tho its pretty old now and definatly scratched up alot.LOL
http://www.mcmaster.com/
search for acrylic
they also got some cool mirrored stuff
tho making the box with this mirrored stuff can be tuff! you pretty much build the box with just predrilled holes and trace the inside position of the box sides... quite a bit of taking the box apart and other sides added just to ensure your trace line is perfect... and measure it and glue the mirrored acrylic down to the mdf pieces when the box is apart still and then assemble the box... hardest part is cutting the stuff because it cracks easily!!!!!! id sugest a cut off wheel to more less melt it apart.... using a blade and trying to crack it apart cracks the corners to easily! i learned that the hard way with my old box setup... tho i just got the mirrored stuff from local home depo. that was about 5years ago... but if you get it done right or at least close a box that has mirrors on the inside can look sweet!!!!!!
and you really dont have to do every wall... you can do either side and just carpet the other sides which will give the inside of the box the never ending look.... its pretty sweet!
i wish i still had a picture of it, but my old computer crashed so much they are long gone. just an idea that might look cool from the trunk...
also with the amplifiers if you do cover them over with plexiglass then make sure you got somekinda opening in the amplifier rack so cool air can get in there easily enough... if not add some fans to help cool them properly....
and with the trunk lid arms, simply remove the clips that hold the trunk wires to the arms and use some zip ties and tie them to the back of the arms instead of the sides. thats how i did mine....
you can kinda see it in this picture... just do that to the wires and trunk release cable...
CLICK LINK....
it lets ya keep the openings alittle smaller and better looking IMO. mine look very close but then again i just carpeted over the whole panel front and back and then just used a razor blade right down the center of the openings not perfect but still pretty nice. its hard to wall off the trunk and keep the trunk arms looking clean
ive been trying to get some 4door hinges from a 92-95civic since they dont use the large C arms, only small hinges and shocks on them. but they are alot harder to find then you would think!