Hey guys, I got the 1/4 plexiglass at a glass store. I was trying for 3/8,but hard to find. I bought two 6"x10" pieces for $4. The plate's use is to cover the hole under the car.I cut both,but when I tried to install them stacked..The threads of the gold bolts did not stick out enough to put nuts back on. I silicones the edges and used one 1/4" piece. This is to just keep out the elements. The heat shield gets replaced,so there is little chance of must debris,water,etc getting in there.I still have the other pieces with holes drilled in it,ready to install. I just traced the bottom of the tower like Y2KSVT said,scribed with a utility knife and snapped of with pliers on the edge of the workbench.The aluminum should work o.k,just keep the thickness down.As it was with the 1/4 piece, I had the wife sit in the car and push down on the gold bolts while I threaded the nuts.Hope it helps you guys, the throw is nutty.

Rod

-2000 SVT-Silver Frost/Midnight Blue #1,382 of 2,150 Born on 01-07-2000 It's got stuff -2003 Lincoln Navigator-Ultimate Silver/Midnight Blue -1997 Kawasaki Vulcan 1500-custom paint,CHROME